ok, here is my very rough review (only played for about 2 hours)...
1. to sum this game up (it is tough to explain until you play it) in one word, epic... i mean the story, the size of the city, what is going on, it all has an epic feel.
2. so far reminds me of some other good sequels, uncharted 2, infamous 2, basically they stuck with the same formula, but made it bigger, with some good improvements, but didn't mess with what made it great...
3. there is a TON to do, i mean already i have a ton or optional missions, optional training, trophies, etc... if you want this game can keep you going for a long time..
4. if you liked the first one, then you will like this one, very solid game (thus far).