Our old boiler was becoming unreliable and it was time for a replacement. Our local heating engineer suggested a Worcester Bosch system, with a choice of thermostats. I disappeared down an internet rabbit hole researching boilers and smart thermostats - I had no idea it was this complicated. Turns out the Worcester Bosch boiler didn’t support OpenTherm so it would be a little less efficient with the Tado system but only a small amount it seemed. I needed to speak to someone who understood all this bc to cut through the noise. With a 5* rating on TrustPilot, I decided to give Heatable a go to see if they could beat the quote we’d been given - and they could, by nearly £500! But then a very friendly and knowledgeable chap, Scott, called me from heatable and spent be 30 minutes talking me through the complexities and making the choice of an OpenTherm-supporting Viessmann 050 an easy choice. The install day was less than 48 hours away. On the day, I got regular messages informing me who would be attending and at what time. The engineer who attended was friendly and helpful, answered my questions and helped setup the Tado system. He also spoke highly of the Viessmann system. He left the place spotless and even tidied up the pipeline which was a bit of a mess. The boiler itself is great. Super quiet and much better performing compared to our old system. It works well with the Tado thermostat and smart valves on every radiator. Overall, excellent experience.