Fitted a new boiler that we had bought ourselves, overcame what was working around a prior installation which was possibly done with newspaper and wood glue as well as a victorian plumbing system and a meter that was two floors below the boiler. The newly fitted boiler is working great and the new pipe work is shiny and tidy. They put their own dust sheets down and hoovered both rooms after themselves so the cellar room possibly ended up cleaner than before. Showed me how to use the boiler and keep the warranty valid (and are even sending the warranty off for me). Friendly and very punctual. No complaints at all.