I have the June Taylor 24 x 24" mat. You have to order them online from JoAnns. I really like them. I use the fronts for initial cuts of fabrics and the back for squaring up blocks. I just replaced the first one I've owned for about the last 10 years. The lines were fading off. This time, I bought 2 because they were a steller price on sale. I had another one. It was bigger. I can't remember the name. It was awful, I couldn't stand the feel of it. And it got grooves really easy. I couldn't wait to get rid of it. I only had that one for about 2 years.
I agree with what everyone else said about your rotory blades. You use a lot less pressure to cut if your blade is sharp.