A salesperson at a local supply house gave me an opinion that they are not as good quality as in years past since they are mostly made overseas, maybe China. I was interested in the Bellwhether also but opted for acrylic so I wouldn't have to deal with the 325 lb. beast.

I got the Bellwether 60x30" it fits a standard alcove drain setup. I don't believe the original Bellwether will. The original B has a very short bottom and slanted front end and back end, while the 60x30 (newer version) only slants in the back. I have been very happy with mine. I have used it daily for a year without issue. I realize the question can only be answered in 20 or 30 years LOL. I have also installed a Kohler cat iron shower pan recently and I am very happy with this.

I would call Kohler and ask if all their tubs are made in the US. I just assumed they were made here. I linked a video from their website.

Here is a link that might be useful: Kohler cast iron video