We use their bentonite clay at my resort spa and I like it. Bentonite is a great product for drawing out impurities, but it can dry out the skin.
Their product is good but once we got a batch that went bad real quickly. It took a while to be replaced but we've had no problems since.
The clay we use is appled in a 90 minute wrap. You would probably want a vichy shower for clay, as it takes some effort to remove it from all the little places it hides (nail beds especially). Some products wipe off real easily, but this one, especially if allowed to dry, can take more effort.
And after a bentonite clay wrap, you'll definitely want to use some good hydrating lotion to offset the drying of the skin.
Good luck!