I am a jaws user and don't think I'd go for NVDA. The reason, is not only that one everybody used to mention, "I'm used to use jaws and I'm not willing to change", but I find it working faster than NVDA and with some good features. Especially Jaws 16, has an improved speed in comparison to previous version. Indeed the speed of navigating was only one of the changes I could notice since my first time of use. I think that both screen readers should be more powerful and responsive. For example, when a program crashes on your system and it takes up a lot of memory, it might prevent them from working. This occurs in Jaws and NVDA, certainly NVDA, makes the worst offence when the synthesizer keeps speeking without ever thinking to stop until you force close it.

NVDA has this annoying thing where it doesn't always speak when there's an error.

Whenever flash decides to crash, there goes your speech.

Even narrator speaks on that screen in windows 7.

@arabic Three Thousand
If you have already a screen reader installed on your computer, why would you need a second one?

jaws could even be more secured. If you take a look carefully, you will find out that many blind users around the world use a cracked jaws. In my country, I don't see anyone buying any copy of jaws. They could prompt you for a serial number for the installation to begin and that would be the peak of the iceberg. I promise the number of jaws users worldwide would be dramatically halved.

The only thing i hate about the NVDA is that, I can't go to the first line of a browser. For example,  on facebook. My heading is at news feed, what i want is to press ctrl+home to go to the line were the curser says facebook. Also in microsoft word, when you write a text and you want to go to the first letter on that Curser by pressing the home key. And i can say that jaws is good in that thing. But i currently use NVDA because I have no problems of using it.

Hi Chriss
I'm not a Keen NVDA user, but I can say that it is a problem, I'd say it's a shortcut you have to go through, rather than an annoying thing. Anyway, still the most hectic feature of NVDA is that it doesn't provide any option to refresh the screen like we used to do on Jaws. Sometimes when an internet website is overcrowded the cursor might be lost through the headings and there is not any way to fix it, apart from pressing alt+tab to go to another view and back again alt+tab to go to where you were previously.

hi guys, alright, time for me to say what i did say before about jaws and NVDA, i said it else ware, but i wil say all this here again.
there was a time, when jaws was king, remember that nice jaws rap song that some one made and released? it was a kool song, it stated that jaws had you covered, its the king  of the block.
there was a time by,
just mensioning the name jaws for windows. it was regarded as the best screen reader hands down.
but sadly that times has changed,
my reasons in a nut shell as to why i permanently use nvda now. is the following.
1. size, jaws for windows is dramatically huge, and unnededly so? do you no why? its not cause its packed full of features. no no. its because of its stupid vidio intersept driver, oops. ah, sorry, hush hush, now, its new name is, mirror display driver. supposed to work much better in windows seven. uh hem, coff coff coff.
that is to say if it does not crash due to a baldy installed graffics driver, wicked grin.
one up for nvda cause nvda goes right on working, ware jaws cursers, and all else fails.
most of jaws huge size today is devoted due to its need to install that vidio intersept driver, i had a close look at the setup file for jfw. because in my cuntry bandwith costs money.
so i got utterly disgusted with it.
reason2.
anty piracy.
while every single business has a right, and a obligation to protect its products. it has no right to treet its customers like sheeps, nor like pyrets  if they did nothing wrong.
i have seen this countless times.
reason3.
cost. due to its expensive cost. and pointless updates, and due to the fact that FS only lissens to the V I P cliants, or the chairmen of this or that, or the counceler for who knows what. features that could have been in jaws long ago. only makes it in if its really rrocking the boat.
in other words. what they done now in jaws sixteen they could have done in 14 already, they purpusfully holding back, causing us to waste money on needless and pointless S M ays.
reason 4. lag.
jaws is laggy,
there is no 2 ways about this. it just is, it lags, if a machines slow, or it lags even if another ap is miss behaving, thumbs up for nvda because in most caces, nvda is lag free, even on slower machines with single core pc's.
and yes, they stil very much around.
the last reason in this summery of a reply is this.
usability/portability/ease of use/ and quick get up and no fuss, just works, featchers  of NVDA.
nvda is the smallest screen reader around. is portable. and is far easier to run, and work with, then jaws, why? o sure u mite get a portable version of jaws. but guess what? there's a catch.
for deeper and tighter integrated functions ists recommended to in stall the? here we go again. vidio intersept driver. also known as, mirror display driver.
so by by portability.
basically if jaws is helping you. and u feel it works, i am happy for you.
sure i wil always use and test it. and i also happily agree that on some areas its defenatly more aksessable then nvda, sure, and i even use it at my work, for limmited areas. agreed,  but guys, nvda is closing the gap fast. very soon in time, FS is going to be left on the road side.
because nvda is gonna pass them buy.
FS  rely on there past successes, and government and schools funding, but in time when the crunch gets tighter, and people starts to look for alternative cost effectave selutions. u tell me? who they gonna choose. jfw? or nvda. i no wich one many business in my cuntry would choose.

Hi
I have both and different purposes.
I am using JAWS
well I also use NVDA when I have to play battle zome.
first thing which I like JAWS is that it has many powerful features like touch cursor OCR and text analyser
secondly I like is that FS had various webinars which are free and covers many features of JAWS.
NVDA I use with eloquence.
but in brouzing I like JAWS not NVDA
yes NVDA is portable but how you use mouse with NVDA?
How you download videos with the help of NVDA?
If you use accessible version of youtube with idman then the thing is that you have to use jaws cursor to switch on the download button but in NVDA you cannot.
in most audio games you have to shut down your JAWS but NVDA will not disturb you.
the question of mirror display driver is frustrating but if you have KMDF and FS admin tool everything will go fine.
this is for win 7 but in win 8 no problem is going on in my lappy.
I think both have their own abilities and draw backs
same will voice over and talk back.
Thanks
Ishan

Well, time to share those NVDA tutorials Joseph's made I think:
http://nvda-kr.org/en
As for youtube,
http://youtube.com/
, more folks need to hit that "questionmark" key while playing vids back. At least if you are wanting help...

hi, btman16,
let me address some of your questions.
first off. the mirror display driver errors u are getting, is exactly what i was refering to in my post. you see the issue is that its a very complex piece of software on its own. and granted, screen readers by them selves are very very complex things. the main big issue with jaws here, is that u have code on top of code. that does certen things. and in time, it has become bloated. unneded code that is. if FS really wanted to, they could very easily trim down the size of jfw. and do a host of things, i'll not go in to here. so for the sake to keep the conversation simplified. i'll answer you in this way. the fact you are getting this error has to do with the graffics driver on your pc. how ever, it may also have to do with secuirity settings in use on the pc, or, left over files from previous versions of jaws. or, simply other files on windows itself. it may even be a failed install in the past. of jfw, triggering this error.  without asking you more spisiffic questions. i cant pin point the exact issue to help you. but no that this is 1 of the main reasons this  screen reader is a pain to get installed. on some computers. o, and lack of admin rights, may also prevent you. ah and uff corse, if the pc tech there mest around with groop policy settings? he may have in advertantly added a setting or changed something that messes with the propper install of the jaws display driver. 
now on to your next question.
for businesses that clames that nvda is a secuirity risk, sadly the person who manages there computer department, is a idiot. sadly, he nose nothing about screen readers and ware and how they store there files.
for him to clame that nvda is a security risk is faulse. infact freedom scientific poses a grater risk, if you asked me. i wil leave u with the following questions to ponder.  on that topic.
because one. we do not no what info they collect about the computer you install jaws on. when info is send to there servers, you cannot verify exactly what is being send. this meens some confodensial business info may be sent. but to explain this to the guy who manages a business computer department is a chor.
sadly if the computer guy advises the boss. that is, the guy who pays for jaws to be installed on the computers, that nvda is a security risk, the boss wil have to take his word for it, as he or she may not be tec  savvi.
its sad to see how much money they'd waste,  installing that screen reader if, the job can be done by a free screen reader. then again, perhaps they have a stigma that any free software is a secuirity risk, in wich cace, i'd run as far as i can from that guy who manages there software installs, :d 
how ever. if your job requires the explisit use of jaws ware access is not available. meening, if nvda does not support a spisiffic ap you are using, then its all fine and dandy.
how ever claming that nvda is a risk? is sadly a very huge understatement, and, i as a pc tech, would love to speek to the guy who made that asesment in that cumpony.
:d :d
i hope i answered a few of your questions.
have a wonderful fluffy day.

hi, afrim, the via voice, packet he was refering to, sounds exactly like eloquence, but, insted iof it sounding muffled, the eloquence voice is crisp and clear. it does not sound as if its speeking over a fone. i am exagerating a bit. but u no what i meen. those who uses via voice. its voice is exactly like the reed voice, nothings changed. but its sample rate is higher, and o man its a joy. it pauses between  sentences, and yes it has some interesting kwirks and glitches.  but it works. and its beautiful to here.

Well, if you're a jaws user, you will see via voice in the old version of jaws. below 7.0...