I just finishied it tonight and I really liked the game. Its an amazing technical achevement the free running/platforming aspects of it are amazing. The story line was good but nothing mindblowing. I can only name a few aspects of the game I found negative.
1: Controls I disliked both the complexity and the contextual mapping ie holding the right trigger for a completly different set of controls maped to the letter buttons. this game has a larger than usual learning curve.
2: the combat tutorials were rather vauge and I ended up learning the controls via experimentaion. The pickpocketing totorial sucked I was halfway through the game befor I realized you had to hold the b button instesd of just taping it. I guess it worke dacidentally for me in the tutorial case i dont remember holding the button in.
3:Repetition: 1st of audio. If I ever see a whiny beggar in RL I'll be tempted to shank her same with the stop thief audio continually looping it runined what was otherwise one of the most immersive and belivable city environments I have ever seen in a game. 2nd the mini quests I got really tired of saving the citizens but I got all the damed achements anyway. The investigation part was ok because it advanced the story line for the most part.
4: I hate when devs waste achevements on scavenger hunts the flag collecting was retarted and I refused to partake in it unless I needed an extra save point. Its just a lazy way for devs to try and increase playtime IMO.
Once I fugured out the controls out I actully enjoyed the combat.