I am so happy to find that this is still available! I bought one from an infomercial maybe 12 or 13 years ago, for my husband (who has a bad back.) He has two herniated discs, and suffers frequent bouts of pain that may last for days or weeks at a time.
I really didn't expect this thing to work when I bought it, but was willing to try anything. To our surprise, it really helps! Sometimes, it is the only thing that gives him enough relief to allow him to get to sleep.
I worried that I wouldn't know what to do if we ever lost this one, so I searched online for another. I'm so glad to have found it again!