I've hit the Sterling website and watched their videos on this material. All pieces are molded from a single piece of material. Most of the information relates to installation, which looks much easier than the procedure for a cast iron tub. I have seen this product at Lowe's and it feels more substantial than any of the other non-metal tubs. And there's a ten-year warranty. Kohler's warranty on cast iron tubs does not cover scratches to the finish...only defects in the manufacturing. I would like to know more about its performance as a finished installation, e.g., how well does the finish hold up over time, and how easy is it to clean...what products are safe to use and which ones are not. I have to make a decision very soon, and am still very much undecided.