I bought the regular Go and didn't like it. I didn't like being confined to just Go brand dies. I sold it and bought the Big Shot Pro and I love it. It takes my Go dies plus all sizzix dies and most studio dies. I also had trouble using the Go-my shoulder would hurt after a few cuts. But the Big Shot Pro is super easy to use (there is a regular Big Shot which is inexpensive that would be about the size of the Baby Go but takes more brands of dies).
My sister has the Go and she's happy with it so it just depends on if you'll be happy with the limited selection of Go dies.