Love my martelli roundabout! Has a cutting mat and a round ironing surface to go on top. They just came out with a round wool pressing mat also made to fit. The Martelli, I have read, has 16 steel ball bearings in it, so that is what gives it the smooth movement. Also, the Martelli rotary cutter is the best I have ever used. Yes, I discovered Martelli products recently at a quilt show. They are a family -run business in Florida and the customer service is second to none.