I have the Go Cutter and the Silhouette Cameo. They both work great but the Go is limited to the dies. I like the Go dies for block shapes, triangles, diamonds, etc. It's limited for appliques. Both machines are great what what they are designed to do and both have limitations. Nothing does everything.
The Silhouette Cameo cuts fabric great. You can download your own pics and things from the Net to use for shapes. I have used it cut applique shapes on printer paper. Then cut the out the printer paper shapes from the fabrics I want especially if the design is intricate or complicated. It is simple to work, just some what intimidating to learn at first.