The engineer arrived exactly on time for all 3 days of the planned boiler replacement and conversion to combi type system. This involved removal of the old tank in the attic and airing cupboard as well as old unused pipework. Before commencing work the engineer covered all carpeted walk ways with a plastic protective film and cleaned all mess up before leaving each day. There were no leaks during the work or since the project has been completed. I am extremely happy with the work completed and my new boiler has been operating faultlessly so far for the last month. After nightmares with past plumbers Rubber duck is highly recommended.