I've been using these to get an extra nap in the morning since I am up so early.  Especially if I was out late or drinking the night before and they have been great.  I don't usually fall asleep but I do feel refreshed after.  Today was the first time that I felt like I was about to leave my body though LOL  I can't explain the sensation but I felt like my consciousness was being pulled away from my body.  I simply thought "NO, I don't want to go" and it ended and I stopped the playback. I've experienced something similar in meditations but the sensations were different. I think I want to take the trip if it happens again.
Cool man! :)
I felt a similar thing the very first time I used binaural beats. I was like "whooaaahh this is coool..."
Dulani Moore