Haven't personally used it but I was looking into getting a set for my Springfield XD-S. Guys on the XDTalk forum seem to love it and haven't had any complaints about it catching on clothing etc. (the rubbery one, not the sandpaper one)
Got mine today. I kind of wish I went with the other kind. The rubber ones are nice, was just looking for something a little more. They definitely shouldn't be a problem for concealed carry. The first time you grip, it just feels normal, but as your hand sweats, and the rubber warms up, it seems to firm up the grip.
I have the sandpaper ones on a few pistols. Great in rain and snow and humidity.
I know you can make your own, but the fit on these is excellent. Hasn't come off yet in two years.
Catches on overclothes a little, but not if what you're wearing is loose. And wear an undershirt if you don't like the idea of sandpapering your lower back.
I have them on both my Glocks (my 2 carry options). I think they really improve the feel of the grip and no, they have never snagged on clothing. It's a really "dry" rubber. If I get another carry gun I'll by another set of Talons for it