I like my Olfa. Before thatI had a Fiskars which I'd had15 years ( and still use it under my Olfa. I have heard positives about both, except that sometimes they have strong chemical odors. I went to Joann's to get one I could smell rather than chance it through the mail and the ensuing hassle of returning a smelly one. I chose the one hanging at the back of the rack because I figured it had been hanging there the longest (and had time to air out). It was fine. That was maybe 18 months ago and it's a great mat.