I actually experienced one of these before I knew they existed; they were in a super swanky hotel lobby restroom, and appeared to be built-in rather than popped on. It was very weird. My novice experience did not go well.

Super spiff.   Wiping's kinda gross, imho.  Especially for girls, perhaps.  Ugh, TMI sorry.  But anywho,  I'm all for this.  And I'd LOVE a totally hands free powder room.  I'm talking doors, water, soap, flush...  Would love this.

Allright, I have to admit it: my mom has one of these, and though I was skeptical at first, I really like it. Without getting into the details, it's very comfortable and
works well.. and hers even has a heated seat, which comes in handy in the winter.