I bought one before the Go was available. To use it to cut squares, diamonds etc, it has to be open on a table that is open at least on three sides. You still have to line up the fabric the same as you do using a ruler. You have to not touch the fabric once cut if you want to cut shapes, you need to move the ruler arm, that's why you need lots of room around the cutting table. The cutting is limited to a smaller space then the mat. It is quality made and the customer service is excellent. I keep mine out on a table and use it mostly to cut fabric to size to use on the Go.