I have the Onyx Collection shower pan and walls in cappuccino. I LOVE IT! The bath guy explained the material to me like this: It's like Corian but with a shiny finish. The pan isn't as shiny though; it's kind of got a pebbled texture to it for slip resistance. It's a pretty thin material, maybe 1/4 inch on the walls. I'm not sure if it can be installed over tile as our previous unit was one of those shower tub combos that had to be pulled completely out down to the studs.

It was kind of expensive (for me, a cheapskate). For the walk in shower with pan, half bench and corner shelves, along with a matching sink and labor that also included replacing the subfloor, installing vinyl plank flooring, replacing the toilet and wiring a fan totalled $4500. I think the shower and sink were probably $3000 of that - but that's just a guess. Oh, and that included a good quality Delta sink faucet and shower system with body jets, shower head and handheld shower too.

The unit is guaranteed for life, is antimicrobial and super simple to keep clean. It takes less than a minute to squeegee after a shower, then every 6-8 weeks apply Gel Gloss, let it dry and wipe it off. I clean the sink with a swish of Mr. Clean once a week or so.

I'm a huge fan of the Onyx Collection. Wish I could encase my whole house in the stuff!