I've been using it for a long time and haven't noticed any quality problems. The built-in Li-Ion battery only needs recharging every 15 days or so, and I brush for a long time. I change the head every 3 months, as I would with any toothbrush. In short, I'm very happy with the Curaprox Hydrosonic Pro.
According to Curaprox, a repair is not possible and I would have to buy a new one, as it is unfortunately out of warranty. I was a bit disappointed, as my Philips Sonicare still charges and runs perfectly even after more than 10 years (!) and was even cheaper.only the battery doesn't last as long.so much for a Swiss quality product.a bit of a shame, as the brushes and cleaning quality are already very good.