I picked it up last week and have been playing off and on. As usuall, I am very impressed with their level design and flow. My biggest problem is with the havok engine stuff. I loved it in painkiller, but dammit it has been pissing me off in Thief. Last night I blackjacked a guy right next to a door that was open, since they both had collision I was forced to jump over the guy I just el kabonged...this did not work so well as the collision on the top of my model was hitting the door. I kept ping-ponging and was put out of this misery by a nice wandering guard.
Other than this, I really like it. It's pretty creepy late night with headphones on
