I recently had surgery, and decided to use the 2nd CD while I was in the hospital, and was even allowed to take the CD and my portable with head phones into the OR, until I was out (the anesthesiologist was concerned that the CD player may have some affect on his equipment.) I felt very relaxed going into surgery, and took this and a number of other CDs to the hospital with me. I used this set before and after the surgery and I can say it helped immensely! (although the hospital food was another story - I refuse to go there! :)
After getting some hot blankets on the area of my incision, I put on my head phones and was feeling great for having just had fairly major surgery.
I still have some pain, and still use this CD when I am hurting, as well as reading. The first Cd is a bit much to try to sleep to, but I'll probably get the Delta slep set for that, but this set has helped me sleep so much that I now have a dentist that uses his CD while drilling and cleaning teeth, and he also seems happy with the results... less pain killers, faster recovery time (and yes, my surgery recovery has been nothing short of miraculous, and has all the doctors wondering, although if I ate food like they served in the hospital, and lifted 10 lbs. right out of surgery, I can certainly understand why!)
I bought this CD set together with several Brainsync's cassettes and after awhile stopped using Brainsync's in favor of this one.
I have just ordered and received Dr. Jeffrey Thompson's "Delta sleeping" and "Alpha relaxation". I hope they are of the same level as the "Theta".