My 1st rotating mat wouldn't take on the bottom section most of the time so I wouldn't use it much. Then at a quilt retreat I saw a round one, mine had been square. It was a Martinelli rotating mat that came with a pressing mat too. I knew anything Martinelli was expensive so decided to keep my eye on their sales. Just my luck, the next week after the retreat Martinelli was having a sale and I scooped up that rotating mat in a hurry. Love, love, love it. PLus its a self-healing mat too. Well made and should last me my lifetime if I take good care of it.