Just finished SoN Act I.
Superb intro video. Very professional.
I liked that while at first the map looks large, the scope is contained and you don't get overwhelmed with side quests or endless non-essential locations. I liked the setup with non-aggressive guards and how the act gets introduced well into the mission (excellent touch). The shop always is a nice addition but I didn't find much need for any of the tools other than the rope arrow which, surprisingly, and given the setup of the second part, wasn't of much use need either.
I had a peaceful thieving experience in two gorgeous locations. Looking forward to Act II! Oh and...