The weapons and smoke trails look decent and there are cool explosions. The only bad thing I guess is the actual tanks themselves. About the first 16 missions they will look all the same except for color. After a while you will see the differences though and will know whether to charge in or retreat and try to snipe. It is a different looking game and it would look really good if you could go up to 1280x1024 at 32bit color or something.
Sound is good but kinda simple.
The weapons sound decent and have a good thud to them on a good bass heavy system. It sounds like a really cool carcrash. There is also a decent engine sound to your tank. The music is also vary varied and helps promote the mood. On that spy mission I was talking about earlier the music is very good on that level.