Started off with all the Creative Grids one, but they are so expensive and is it me... or do they seem like they scratch easy. I'm the only one who uses my stuff and I take good care of it, but still scratches. Two things happened in less than a week. I dropped my 12 inch... first one I've ever dropped and chipped a corner. Still usable, just not the one corner. Then I went to a class and the ruler was so hard to read on very dark fabric they handed me an Olfa and that worked great. JoAnn's had a sale the following week and I picked up a bunch of the neon green OmniGrip ones. Those are fantastic. Never move. The slightly thicker line doesn't bother me. So now between the two they work great. However, I'm very curious as to the frosted Olfa. May need to try one of those.