Sorry for taking so long to jump into this topic, I saw it, but figured that no one would even try to buy this, but it seems like you guys are not convinced yet. I have this on my PC. I bought it for my housemate. His PC can't run it, so I installed it on mine.
I have been watching him play it a bit, and I promise it is not playable. Navigation aside, the battles are very tough, and if you die a certain amount of times your save gets permanently deleted. This is a game designed to be difficult. It is one of their selling points and it actively punishes you for not being good enough. The combat system relies heavily on well timed parries and blocks, and sometimes there are a lot of enemies around you. There are times where I cannot tell how many enemies there are, much less from where they are attacking and when exactly they are going to swing or if they can even reach. I did not try tweaking the sound settings to try and make it work for me though, but that is mostly because I can tell when I am just going to waste my time.
There are puzzles that require you to see things too, as in focus on them with the camera, not just know where they are.
As for the voices, they mostly either insult you, contribute to the story, or let you know that you are dying. They will not assist with navigation at all.
If anyone has any further questions, I will try and answer them. I can even ask my friend to test things while he is playing, but I think it would be a waste of money to buy this.