I belong to several paid membership online quilt sites and have watched videos of many named quilters say different things about different mats. Some say the June Taylor mats are the best because it is a hard surface mat, the rotary cutter will not cut into it so the blade does not dull as fast. Some say the self healing mats are the only ones to use. Many are raving about the newer mats, the same as industries uses. The mat that is on my Alto Quilt Cut is the best I've ever used. It's cream with gold lines.
http://quiltcut.com/products_cutting_mats.html