I had an acrylic pedestal tub in my last home, it was beautiful but it did not retain heat as long as I would like. Also it had to be reinstalled and I think they put some type of foam/cement in the base and then it did not budge at all. I also need to make a decision on a tub in the next two weeks and I will likely go with a pedestal acrastone tub ( American Bath Factory Nob Hill) . My first choice would be a victoria albert elwick if I had the space, I need 60" and I can not find a pedestal style I like in a 60" length with this company. Please post what you decide to go with.

Or does the tub filler get secured onto a stringer installed between the floor joists?

We got a very good deal on a Victoria and Albert tub, but we had also been looking at "vintage tub" and they had some ones that looked nice. We had bought a Pfister faucet to go with it, but it was too low for our tub when they went to install it. Then we were stuck with having to get a faucet which had the same center distance on the pipes and there weren't a ton with the 7" centers so ordered the victoria and albert faucet but it was almost too high above the tub and so so expensive. In the end we got one I really like from vintage tub and looks wise the polished nickel finish and the porcelain on the handle as well as the feel/weight etc. looks just as good quality for 1/5 the price of the V&A one. Haven't really used it yet as it just went in on Friday so can't speak for long term use.

Well, the pictures didn't load.. And, disclosure, I don't have a wet room...but I think they're a great way to have a tub and shower in a space that otherwise wouldn't allow for them (if you don't want the shower in the tub). From what I understand, it will feel cold...both because of the size of the space, and also because you will only have a panel....so I would do lots of research on the best heating for that kind of room..