I hadn't heard of these until you posted. Here is a link if anyone wants to check them out.
Die-Versions - Universally Crafty!!
They do have some interesting dies. I only have a Cuttlebug though, and I've had trouble with the intricate dies. Even with a metal shim, I still have places that don't cut cleanly.
From reading about these dies, you need to do a lot of experimenting and use different layers of cardstock shims to get them to cut properly.