We've got two of these units in a house that we purchased a few years ago. They look great and are fine in all respects, except that they are constantly filthy and require almost daily cleaning, like no other toilet I've ever seen.

The low-volume flushing system and small amount of water in the bowl may save water (I'm on a well in a place that gets plenty of rain; so frankly don't care), but I doubt it, since you have to flush the darn thing repeatedly to try to keep it clean. We've started preemptively flushing before even using, just to try and keep you-know-what from sticking all over.

If you feel like giving your toilet a thorough spray-and-brush every single day of your life, then maybe this is the one for you. I'd love to junk both of them and start over.