Anyone using one of these for home use? Starting to see them a lot on higher end homes around here and thinking of getting one for us. Only downsides seem to be the expense and the louder flush noise, but the noise seems tolerable and is over very quickly. As far as the expense, about $420.00 for the one I would get and we only need one and since they last for quite a long time I don't see the cost as unreasonable.. The pressure tank can be replaced for $120 should it need replacing. Anyway, it seems much cleaner and efficient at its job than a normal gravity toilet. Thoughts, experiences?