I have looked at them but never used them. I have heard it is supposed to be for copperfoil projects only though. Others will probably give there opinion but I think it is a good system. Its on my list of wants!!

I have friends who had it, but they're not doing glass right now.. you reminded me I've got their stuff, so it must be here! :) Previously, I just used a piece of plywood w strips of wood stuck on in an L shape to make the first corner.

I too have used a plywood frame of sorts but this has always appealed to me..it sure would make me have to cut better!lol!