Just a note to say i recently bought infamous and i am not going to write a review for it because, although it is awsome loads of people have already given it positive reviews.
But if you were considering it as a game to buy then go for it as it is even better than i had hoped after playing the demo.

I have also just posted a tip on the ps3 discussions board for how to get past hard missions so feel free to check that, and my other topics out on the playstation3 and DS sections of the forums area.