Well as I've spent most of my life in th UK I'm in the never owned a bidet group. I must admit when in hotels on the continent I tend to use the usually seperate bidet more as a foot bath than as an alternative to paper wipping.

Would I buy one, NO. Would I use one of your combined units if I was in a house with one, probably yes, but I have to admit I have never really worked out what you are supposed to 'dry' with after using one, paper or towel? Perhaps one day if I suffer from some of the ailments you say they are good for I would revist the question, but until then I guess I'm just a 3-ply kind a guy :)

Julian