Self Healing Olfa mats for me! I have 3 of them, one of them is about 20 years old, is a little marked up but still works great, the other 2 are 8 or 9 yrs old and in almost like-new condition. Keep them clean, store them flat and they will last a long long time. Helpful hint for all self healing mats: I use a gum eraser to get any little threads out of the cuts between the times that I wash them.