It's great fun... Even though the story is shallow and the premise is familiar, I have to say Crackdown is still one hilariously violent game. You are an Agent working for the Agency and your mission is to go out and kill the three main gangs who are progressively taking over your city. You are a superhuman who gains experience by killing, racing, jumping, running, and throwing grenades. It's one of the best games on the 360!

I love this game. It's great for just wasting some time.

It is indeed a splendidly entertaining game... there's a review here if you're interested in reading more:

http://www.itreviews.co.uk/games/g300.htm

well i played the demo and wouldnt stop playing it for about a month lol. me n my m8 on xbox live had an awesome time wasting session lol. getting to 4 *s on abilities and pissing around was just so great. Hopefully i will buy the game soon