I've had the Hypno CD for a while and tired it a couple of times when I first got my aneros. I didn't have too much luck with it. Today, I decided to listen to it during an anerosless session (with a teeny bit of KS mixed in).
The results were actually quite good. I managed to get in a full-body tingling state that was really enjoyable. Towards the end of the session, I had a string of very intense dry-o's.
During the session, I used the CD to get into as relaxed a state as possible. I don't think I managed something I'd call a trance, but I got a lot closer than I have in the past. I'm looking forward to trying this again soon.