We treated ourselves to this shower in our bathroom renovation. The delivery arrived very quickly, unfortunately it turned the plumber when he wanted to use them, firmly, that the left knob was broken off at the thermostat. Spare came easily within three days and everything was fine too. Now we have to use them quite a few times and we loved it. Problems with the knobs we did not, although they are smooth but still good to use. The only small flaw: the hand shower to drip for a while, what with a shower in this price range really should not be. Otherwise, I can recommend them necessarily.