I have used both ....
However, I do not like the newer mats that seemingly are not the "self-healing" that was the big sale feature of Olfa, way back. Instead, I find that with the newer ones, I feel as though my rotary cutter, slides around more and does not cut as accurately/evenly as on the self-healing.
So the question that I have .......... are self-healing mats available any longer?
Thanks!