Wish we had done this before. Ordered a Bio Bidet BB-800 Prestige Bidet Seat for every WC except one we virtually never use. Good design. Not a lot of models with high end functions and a fixed control panel. I don't like a hand held or wall mounted remote.
Engineering is excellent with a few possible exceptions and maybe I am just missing the reason for. One is the T to route water to the seat.
Toto puts the T between the normal water line to the tank and the tank. So only one existing hose end is disturbed and a very short additional hose goes between the T at the tank and the seat.
BioBidet, puts the T at the shut-off and completely replaces the original water line to the tank and adds a line to the seat. So, both ends of the shutoff to tank hose are disturbed and they have to provide a much longer hose to the seat and potentially have the new one not long enough. Not to mention that some homes, such as this 1987 vintage one did not originally have removable connections at the shutoff although that was changed many years ago.
I wrote to them asking the reason for the more expensive/higher risk design.
On the plus side, the mechanical lever that release the seat from the catch plate also automatically drains the heated water tank into the bowl. Many brands require extra non intuitive steps and turning the seat to a certain orientation.
The water temperature and seat temperatures can be set so high as to be uncomfortable which is a lot better than not getting as hot as you'd like.
The air drying might require some patience since obviously it takes longer to air dry but if you are patient, air dry means your hands never touch anything but the control panel. So, you can laugh at any toilet paper shortage.
As with anything mechanical, there is no such thing as too quiet. You can hear the water pump when the nozzle is being used. But no more annoying than say the sounds a refrigerator ice maker makes; not really loud but makes you wonder what all the different components of the sound are.
Got a little bit of a scare because the factory shipping boxes say in big letters "do not turn upside down". UPS left them all upside down. But they all seem to work. I've also written the manufacturer asking why the box shouldn't be turned upside down. Now I can't stop thinking about the joke about the goblet you must always drink out of one side.
I knew this model did not have multiple memories for positioning the nozzles but we knew we didn't need that.
I haven't plugged one of these into my Killowatt yet to calculate what the annual cost will be to heat the water and maintain the seat temperature to our preference.
It's a little annoying that no models I'm aware of have a wide selection of colors and many (like this one) are only available in one color. Toto for example has a few colors, but not the color of our toilet, sink, tub not to mention wanting close to two hundred extra for anything but white.