Some things that have annoyed me though:
The game frequently changes your weapon - so if you're trying to be sneaky with the crossbow, then decide to throw a rock - the game will happily equip a bloody gun after the rock is thrown; forcing you to have to pick the crossbow again! This has caught me out a few times now, and you really have to pay attention to that bug/feature, or you'll end up blowing your stealthy approach.
The AI is pants, utter pants - and they fall foul of one of my pet peeves too - they are psychic!!! You can be in the dark, hiding in a bush, and take out one of their buddies - only to get near pin-point shots raining down on you from their mates. The 'freakers' aren't as bad - but interactions between them and enemies can often be comical - using rocks to draw them in, they can almost be standing next to an armed guard before either notices each other
It's just not as polished as you'd expect from a Sony flagship title to me, which is quite a shame - I can see me persisting, but it's likely to be a game that I play in dribs and drabs; as it'll bet repetitive and dull pretty fast.