I have the Go. I put the mat over just the shape I want to cut, not over the whole die. I usually roll it all the way through, it's easier. If I have a die that has a few stubborn spots that won't cut through I reverse the roll to re cut it before the die is through. I save my old mats that split and cut to fit the shapes on other dies. I am not that gentle with my Go and try out all kinds of things to cut with it. I have the electric Go now so the manual one will get all the iffy cuts. LOL