This episode was pretty good. It had lots of potential, but I don't think they made it quite as good as it could have been. I think that instead of having the story set in the rehab for middle class-ish people it should have been set in the one they find Hanson in at the end. I didn't really get what was SO terrible about the one Kenny was in compared to the end one. Also, I wish they had given us a recap of the pilot episodes so we better remembered who Kenny was, because when I started it I had no idea who he was. The ending was really effective, when they walk through the place looking for Hanson and finally find him.
All in all, it wasn't bad, but it could have been amazing.