Ordered online, was kept informed of what was happening every step of the way. Had shopped around and heatable were considerably cheaper than other quotes I had. Alex, the engineer, turned up when he said he would and made an excellent job of fitting a new Viessmann boiler turning what was a bit of a messy job into a very smart and proffessional installation regardless of the fact it is in the loft where no one can see it! Job ran on a bit longer than anticipated due to a missing nest thermostat which, after a bit if detective work, was found to have been delivered to the wrong address, thank you parcel force! Any way Alex stayed very late to ensure that everything was working properly and that even an old technophobe like me could work it! Couldn’t ask for a better job and couldn’t ask for a better engineer!