My first rotataing mat I hated with a passion so when Martelli had their round rotating mat on sale, I grabbed it. I'm in the process of slicing and dicing as I call it 306 4-patch blocks so having a rotating mat really helps me. This one also came with the pressing mat too though I've never used it in the years I've had this one. I gave the other one away just to get rid of it, I hated it that much as it would slip off the base all the time. The Martelli mat is a self-healing mat and never slips off the base. I'm still in the process of slicing and dicing my 4-patches as I do 24 4-patches at a time. It's a disappearing 4-patch pattern I saw on YouTube, an optical illusion pattern.