Originally got it for my wife.
because she always had back issue and I wasn't always around.  But I just did some heavy lifting one day, woke up with pain in my upper back, having probably pulled a muscle, got a massage to treat it, which relaxed me sure, but didn't make it go away, then I remembered I had this little gem lying around. which allowed me to precisely target the nasty muscle that was causing me grief and make me 100% happier.
Rating: 5 stars