graston technique?

Anybody know anything about this? My ART guy told me he just got certified in it and wants to try it out on me. I’m wondering what the deal is. Check out this website for some basic info:

i think it can be beneficial, but i wouldnt receive it if your therapist just learned it. get it from someone who has been doing it for awhile. i got it done once on my calves and IT band. hurt like hell, but i think it worked some tightness out, though i won’t be getting graston done again. charlie???