Beautiful looking game, controls are different but work. Game play is fun, but some of the stuff, like sitting on a bench listening to bad voice acting gets repetitive. It's a fantastic example of what could be done. It's just unfortunate that they didn't do it. They also killed the surprise twist, total waste.
Still though it's a fun game and generally speaking worth the purchase. There are some fantastic WOW moments, like when you climb up a building and can oversee an entire city and the major kills are cool. It's some of the in between stuff that gets kind of laggy and otherwise ruins a generally good game.
Whatever your take on it though. This isn't one of those games you buy a system to play. It's good, but definitely not great.