Careful for the cheap bidet add-ons you'll find on Amazon and what not. A friend had one fall apart in an upstairs bathroom while he was on a weekend getaway. Now half his house is flooded out.
Do you know of one of these that can work with an outdoor, underground main valve? It seems like the vast majority I've seen either need mains electricity access (which isn't readily available underground in the front yard where the valve is) or aren't fully weather proof (which is a problem when the valve sump fills up during large rains), or both.
Have 2 Washlét S550e that are about 4 years old. Customer service is excellent. The only downsides are no bowl light while lid raised and both randomly lifts the lid with no one there.