Love the game. I don't own it, but I play it at my friend's house. I have a 17 Berserker, all I use is my shotgun and I'll shoot out the occasional rocket. It's such a good game so far. My only complaints are the controls of the car, and the in-game menus during co-op, it's so annoying to have to scroll around to see part of the menu.
But, those little complaints are nothing compared to the awesomeness of the game.