The cheapest bidet attachments all have very flimsy plastic threading for their supply lines. My first one did develop a small leak after eight years, but by then it had more than proven the concept and I bought a nicer one.
Honestly, I have no idea why Europeans still use their old-fashioned bidets now that washlets have been around for several decades. Why would you want to use two different devices just to do a #2 when you can just sit on one and get it all done at once?