Just my two cents... I thought I would share my thoughts on this so other people could give it a read and see if they wanted to buy the game or not. I thought personally the campaign was amazing. The physics are awesome, and the gameplay is different every time. That's why I really like arcade mode. My honest opinion though... I haven't played to much multiplayer but I didn't care for it much. It's not fair of me to say it sucks because I haven't spent to much time with it but it wasn't what I expected.
I would buy this game just for the campaign and play it over and over. As well as the arcade mode to try and beat other peoples scores on the leader boards. I got it for the 360 and I will be keeping it. If anyone is interested in the multiplayer though you might be in for a shocker... Like I said I don't like it too much.
I can see myself playing campaign and arcade for ages though. Who knows maybe I will figure multiplayer out...
Just wanted to make this topic to share my thoughts on this game.