I had a Go and a GoBaby. I sold both of them and bought the Studio. I am much happier with the Studio. It has more range, even if it's not as portable. It can also accept all the other dies from the 2 Go's, the Sizzix, and Big Shot using adapters. I love being able to cut a large number of strips in a short time. I also made a quilt with the Go tumbler die. It's nice to have prenotched. If you like a certain shape and they don't have it yet, the company does do custom shapes, but they do cost.
The Studio from Accuquilt and the GrandeMark from Accucut are the same machine (different lines from same company), so you can watch both sites for sales. I bought mine on sale.