We moved soooooo many times before finally settling down for good (at least i'm hoping there's no more moving!). Never occurred to me to find brand of the toilets in all those places, but we never had no problems with any of them except for the occasional jingling of the handle to stop the water from filling up the tank. All of them were porcelain. Hope this helps

Happen to find this article on Toto toilets http://en.wikipedia.org/wiki/Washlet