Well we have one and pleased with it so clearly biased
It came fitted to the new build three bedroom bungalow we moved into 3 years ago and is coupled to underfloor heating with individual thermostats in each room plus a tall 167 litre hot water tank. Quiet in operation with worst case current draw around 2.5kW mid winter. Pump output temperature is lower than a gas boiler but offset by increased flow controlled by intelligent circulating pump. This also means that immersion heater is needed as top up during the winter but for barely an hour each day and mainly to ward off Legionnaires disease. We have 3kW of solar as well with FIT and have electricity (only energy source) bills between £15 and £30 during summer months.
