Had other cutting mats the big problem that these by sunlight (or other heat sources) could be wavy sometime! That bothers and looks ugly. As the only supplier of this manufacturer has in its product description Extra attention to this issue: "When should set deformations after years of use, the mat can be placed for a while in direct sunlight and smoothes out again." ... After nearly a year use are so far were no deformations in my Stieber mat. Hope it stays that way, if not, I will rectify this review. So much for a strong buy recommendation for this brand because of other just this problem of customers is called as a shortcoming. (Just hope that is not the production set, because it is not currently available)
