You do seem to be downloading a fair few demos Game man?
Anyway, as reguards Gma tank commander, as you say, the sound and play of the game are extremely good, with lots of atmosphere, a variety of enemies and many different explosions. One thing you should know about the game however, is that it isn't easy. Even on the lowest difficulty level the last couple of missions are quite a challenge and you'll find yourself cursing some types of enemies. Though the controls do take some getting used to, this is more a matter of just the fact that your simulating driving a tank, not actually a problem, and there are quite a few different ways of accessing commands through the keyboard (I for example found it much easier to move the gun up and down using ctrl and the arrows than the page up and down keys).
On the down side there are only six missionns, and as I've said the last two are quite a pest, the missions are stil fairly interesting though Imho.
I like the game, and I'm not sorry I bought it, but I must admit that I don't play it as often as some other audio games, due to the difficulty, and intense concentration required.
If you want something that's fairly realistic (for an audiogame), very military and requiring some stratogy as well as reflexes, you might like this game.
With our dreaming and singing, Ceaseless and sorrowless we! The glory about us clinging Of the glorious futures we see,
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)