Yes, I'm in and love it!
I have the Go Big with the extension table and 2 baby go cutters. Our LQS offered classes with a great instructor that taught us the system. We had monthly classes that included the applique shapes with embroidery designs. I started with individual dies to make the 12 inch cubes and later purchased most of the cubes.I have the 16 inch cube on my wish list.
There is a new cutter coming out in the Fall that might work if you have space issues. Sign up for the notices on sales. I've found the best time was the week prior to the Black Friday sale in past years.
Register your dies on the site or on the App. It will show you the dies you already own when looking at patterns. Check the tabs as there are reference pages for cutting and fabric requirements for the dies.