I have one and like it. I recommend shopping around online for a good price; someone recently posted they found it for $224 online.
Mine was hard to crank at first; it gets easier to crank with use. I never cut more than 4 layers at a time. Have heard that the rag die can be a pain because it needs frequent cleaning, although people still like using it.
What I *really* like my Go! for is cutting out triangles -- fast, very accurate, and all the dog ears are cut off! Makes for easy accurate piecing of triangles. Also like it for strip cutting because it is a little faster than my Shape Cut, although I also like the Shape Cut.