dphatt this blows my mind. I use my hypervolt before every round without fail. Helps me get a little looser before I stagger to the first tee box smelling like a brewery...
Also, as to the hypervolt (I think any of these "guns" are awesome), I do know that most of the PT places I've visited, as well as people who I know in the industry, typically use a hypervolt given it's three different intensity settings. In fact, my brother who still lives back home in the midwest was out visiting a while back and saw my hypervolt sitting on the counter. He says "whoa, that's what they used on my back when I did PT last year." So, again, a lot of the professionals use it, so it must do something!