I ended up purchasing 3 Gwyneth once piece toilets and we absolutely LOVE them!
The universal height is great...except now when i use someone else's toilet it always seems so low! lol The Sanagloss is good and the double cyclone flush cleans very well most times however sometimes you do need to use the brush a bit.
My only minor complaint would be that the flush is a little bit noisy but only for a second so no big deal.
Overall I rate this 9.5 out of 10
Video of performance