In my opinion , Martelli is the very best on the market. I have been using them for years. They don't ruin in the sun. I don't but they say you can even press on their mats. When I was in their shop I had them to make me a special ruler, that I use to cut my bindings. I cut my bindings 1 7/8 inches and my new ruler is actually measured to that size. I can cut 7 strips without moving my rulers. Wonderful ! ! ! They are not cheap but seam to last forever. I will never go back to anything else. If they are at a quilt show most of their things are 1/2 price, but they also offer online specials. You should sign up for their emails, then you can get their ads.