I trust this more than I do the reviews which seem to be mostly positive but mixed.
TL;DW
Pros: Fun combat, Beautiful environment, Do anything anywhere (for the most part) and play anyway you want. Enemies don't get more HP as you go deeper into the game to negate your skill and strength increase, but they will kill you faster if you're not careful. Basically typical what SP has done with inFAMOUS in terms of combat. Kill fast, die fast. Don't be reckless.
Cons: No lock on system occasionally causing you to attack the wrong enemy while in a stance that was meant for another, side quest repetition after about 30 hours.