I have a GO and a Sizzix big shot........I know they say you can use GO dies in Sizzix with the help of some kind of shim......but I keep all Sizzix stuff with Sizzix cutter and all GO stuff w/GO. Looking at the cutting mat for Sizzix....it does look like a piece of plexi, whereas the GO mat does not...thinner... Some things are better kept separate, just like attachments for sewing machines are not interchangeable