There's a group at
http://groups.yahoo.com called accucutquilters that has a lot of members with the Studio. You might want to join that group.
I have a Go! and routinely cut 4 layers at a time. The Studio is supposed to be able to cut up to 10 layers at a time, but I'm not sure how many users actually do that.
My Go! was too stiff to crank at first for 4 layers, but it loosened up with use.