I have 3 of the EliteZ XS' in my bag. They work pretty good for my backhand shots. I can throw only around 300' with it, but that's more of my technique than the disc itself. I do have my one and only ace with my older ELITE Z XS.
I really don't see too many people use them. The Z XS holds a good line for me. I'll always have at least one in my bag.