First of all, the folks at Bibo were great. The product arrived next day delivery, a bit of a glitch with the set up as the 'menu' button refused to work properly. A quick call got an instant response, the promise of a technician call within 2-3 days. Unfortunately he turned up with the wrong part! Not his fault, as the innards of the BIBO unit had changed! An update meant an improved control unit was required. The correct replacement unit was sent to me over the weekend and the technician returned the next day to instal. All working near perfectly now. The handbook refers to a hard water test that should have accompanied the unit, but no sign of it, even after an email request. The unit means a new level of convenience - instant hot/cold water - no more noisy boiling kettles! Overall happy with the purchase!