I played Imp with Nathan while it was in playtest and had a great time, but when I got the book and tried to run it I had a lot of trouble.
My chief frustration was the combination of (1) the PCs succeed at most every roll, and (2) there are no real fictional limits on what they can and can't try to accomplish. The result of this was that it was difficult to have any kind of horror or even just tension when the characters felt no meaningful risk of failure. Furthermore, the game emphasizes difficult social situations and people with awful behavior. But there is nothing to stop the characters from responding to any person behaving in a way they don't like with a stern scolding to make them reform - which will virtually always be successful. Thus the game seems to suffer from the "social conflict as mind control" problem in an especially acute way.
Open to thoughts on how to approach the game in a better way.