Have just brought one, so far it is the best thing since sliced bread. I have never been able to cut straight (we won't mention sewing straight) and the Go has certainly change that. Love the triangles, strips and also the appliqué (only have the dog and cat so far). Be practical when buying the dies, get the basic one first and enlarge from there (I don't listen to this advice :-( ) I also did a lot of contemplating before purchase, but watch YouTube and that will certainly give you a good idea if it is something you will use to it's full extent.
There a loads of free quilt blocks on the site to use and to make use of the dies.
Hope this helps a wee bit.