Better is Better
Personally, I’m not going to buy one.
On the other hand, after somebody tries something, you name it-
Cross over Study
Double Blind Placebo Controlled Study
Cranial Sacral Massage
Lymph System Massage
soap at the foot of your bed
Well, you get the point. If you tried it, and you feel better, then keep right on doing it and see if you feel better and better.
Call it the Placebo effect, heck, call it whatever you want. Better is better.