I recently had a boiler installed and an additional radiator with the hive system. I have to say that the whole process was excellent. The engineers both the plumber and electrician treated my home with respect. They explained the process and also kept me updated. They cleaned up afterwards. I did have an issue the next day but this was expected as the additional radiator needed balancing again an engineer arrived who sorted it out and was extremely polite. The difference the new boiler has made is great. The heating system is functioning extremely efficiently and the house is really warm. I would recommend the replacement boiler to anyone as you may get it a bit cheaper but you don't have the backup and the professionalism. I think it was worth every penny.