Posted this on the FB thread:
Yeah, compression of the tissues and moving it helps to break up tons of scar tissue/adhesions/etc. and also the pressure will help to "reset" joint mechanics with the newly released tissue. Good stuff.
As far as overall knowledge base goes, this would seem to tend to work more with acute tendonitis rather than chronic degenerative tendinosis... though it should theoretically be able to help both to some extent. The former probably more though.
You also get a lot of good stimulation of mechanoreceptors to mask pain.
It can help with healing an injury although it's not a general panacea depending on what the injury(s) actually are...
It's generally worth a shot though unless you have chronic degeneration where things could break