My Stick arrived two days ago, and I've been putting it to the test on my right hamstring.
First of all, it's quite an upper body workout! To hit the hamstring effectively (when it's not tense), I lay on my back and bend my right knee straight up (foot on the floor). Then I roll up and down on the hamstring. The Stick is meant to really dig in, so that's what I do.
I can tell you with confidence that my right hamstring is a complete mess! When I roll over it, it feels like a bumpy road, especially compared to my left hamstring. My guess is that I've got a lot of scar tissue built up, which may be why it's taking so long to heal, and why it often feels tight & like it's pulling during some runs.
I've decided to stop stretching it for the time being (which usually felt uncomfortable, anyway). I'm also going to hold off on the ice and heat. I really want to see if I can break things up in there first, so I'll have a good idea whether or not the Stick is making a difference.
So, after a couple of days of really working it over, it's pretty sore. I'm going to run on it in a couple of hours. I'm sure it's too soon to feel a significant difference, but over the long term, I'm optimistic that I can undo most, if not all, of the damage.