If you buy and play a game to find everything that's wrong with it - then you will find everything that's wrong with it - plus you would have wasted 40 pounds. If that's your intention, save your money.
The concept of this game is amazing and works very well. They have focused on the free roaming elements a lot and succeeded in creating one of the most powerful (grey area) character ever!
It's simple - if you love power, you will love this game. Slice until your hearts content, glide through the air like you've never glided before, cause untold chaos within the Big Apple and destroy anything that stands in your path.
What's not to like?