Presales, delivery comms etc was great. Problem was with installation. Engineer saw the water quality was poor and recommended a flush.. but still installed a brand new boiler with poor quality water running through it causing fault codes and intermittent hot water /heating for a week. The magnaclense was installed in the airing cupboard (furthest point to the boiler.) Manufacturer recommends its installed as close to the boiler. The pump over-run switch was not installed. The pump runs way after the heating is switched off. Overall, the install let me down.