I really like, well, everything! The quality, music and sounds, wide rage of weapons, gameplay etc.
I loved the way you got a random gear at the end of any mission and how you could buy more for other "Backpacks"
Only "bad" thing about the game is the money.
EX: after the third mission (not counting tutorial) I got one of the best tanks in the game, the "War Gear".
I also think there should be a upgrade system for weapons and tanks, like the "War Gear" not coming with turrets, only slots for them. But still, this is just some minor nitpicks about a, overall, very good game!