I have tried them all, Fiskars, Olfa, Clover and hands down my Martelli wins. I agree with other posters who are in love with their Martelli Mats. The mats are expensive, but almost indestructible. I am so spoiled by using the Martelli, that I hate to use any other. I also like their cutter, have both the 60mm & the 45mm. 60 will easily cut through 8 layers of fabric.