I have the GO BIG. My DH gave it to me for Christmas a few years ago because he knew I would use it. I use it mostly to cut squares from scraps but I do have a few other dies. I've found the best deals on the dies from the Accuquilt.com site but I also have purchased from the Canadian site.
I do think it's easier and faster to cut strips just with rulers or the June Tailor Strip cut but when it is set up it is very convenient to just use it.
At that price you can give it a "go"
and decide if it's for you. Someone would always be ready to buy the dies and machine together.