I have the Go. I really like it. Makes cutting so much easier and so quick! Yes, you do have to replace the mats but you have to replace the blades on the regular rotary cutters too and here lately mine have been cutting me up! LOL Good luck on deciding. If you are a facebook person you can "friend" accuquilt and answer the question they ask every Friday for a chance to WIN ONE!! That is how I got my regular size GO! I won it back in Oct!! I WAS SUPER EXCITED!!! Still can't believe I won! :)
Hugs!