i bought mine from them (shipped to the netherlands).
truly an awesome pad, it's incredibly flat and incredibly consistent. it's not gonna wear either.
i'm actually thinking of getting a second one because i was dumb enough to bend one of the corners of mine. Edited by Bucake - 7/19/16 at 10:42am
it doesn't scratch feet, but i guess does wear them out a tad quicker than cloth or plastic would.
it's not that fast, my plastic pads are noticeably faster. from memory, frosted glass has a bit more friction/control, but i'd have to dig it up to compare