I don't have any experience with Toto tubs. However, I recommend finding the tub somewhere so that you can actually get in it. I chose a Kohler tub from the catalog, but when I saw it in the showroom I didn't like it nearly as well as I thought I would. I ended up choosing a different tub.

OK, I know this thread is ancient but I just had to add my two cents worth for people who come along later as I did. The idea that cast iron retains heat longer than fiberglass or acrylic tub materials is simply a myth. Cast Iron, even with porcelain over it is a better CONDUCTOR of heat than any of the modern tub materials other than steel. Steel and cast iron will conduct heat at more or less the same rate with differences that would only matter in a lab. Cast Iron will transmit heat to the surrounding air and other materials faster than fiberglass or acrylic, which are both better insulators than cast iron. This is the exact opposite of retaining heat. Anybody who doubts this: Take a cast iron pan, fill it with hot water. Take a plastic pan of equal size and fill it with hot water of the same temperature. Put the pans side by side with a thermometer in them. Check them an hour later. I guarantee you the water in the cast iron pan has lost more heat and is colder because cast iron is much better able to radiate heat to the surrounding air than plastic. There is no way that any metal tub whether steel or cast iron is going to keep the water in it warmer than fiberglass or Acrylic will. Yes cast iron does radiate some of the heat from the water back to the bather above the water line, which some people like, but it does this because it's a better conductor of heat, not because it holds heat. The sole advantage of cast iron is, admittedly, much greater strength and if you want maximum strength steel is stronger still. I've demo'd multiple cast iron tubs into pieces with a sledge hammer. It shatters easily. Try that with steel.

I see quite a few online. Here's a couple places: http://faucets.efaucets.com/faucets/54%20Soaking%20Tub http://www.vintagetub.com/asp/product_detail.asp?item_no=savingspackage54-SH Hope this helps.

Andersen is a pretty big company with quite a few smart engineers. If the product is that good, why not issue a lifetime warranty on the frame. I have seen quite a few examples of premature material failures in the case of the fibrex material but those are just my observations and should be taken in context of the small sample study. I strongly disagree with the idea that fiberglass (Marvin or otherwise) will only last just as long as fibrex. The resins in fiberglass are much more UV stable than the vinyl used in fibrex and there are thousands of examples of 30 year old boats that are doing quite well in far more inhospitable conditions than a home's window placement. Fibrex is 70% vinyl by material make-up, if that is okay, you can probably go to a 100% vinyl window and be just as good off for much cheaper.