I received a pack of EZ960 while attending MOJO 2019. My mood swung the other day to working in silver clay giving me a copper clay a break.
The web mentioned some difficulties with this clay and here's what I found: it dries a lot quicker than fine silver, 3 cards thick was very flexible after drying, and it will stick to a rubber block!
Otherwise, it took the imprint beautifully and kept it after firing. It is sturdy and hammer ready after firing. The results were very satisfying. As you can see in the photo, my pieces were simple, so don't know how it works with more involved designs. I will also confirm firing temps for cabs because mine discolored a bit.
I like this clay.