I had confidence in Jim's ability and felt safe from start to finish because he is a Which? Trusted Trader. He quickly arranged a free survey and arrived on time 15 minutes later! Before entering my home he produced his ID photo card and Which? Trusted Trader credentials without me asking. He explained simply and clearly the various types of boilers and systems and drew a diagram of my existing system to give me a clearer understanding. We discussed various options based on my needs and he gave me impartial information about each. I was happy to accept Jim's recommendation for the Ideal Logic Max Heat 18 Boiler. The installation was problematic throughout due to lack of maintenance of my central heating system and cowboy repairs. However, by sheer grit and determination Jim overcame all the difficulties. Every time a problem arose he just kept going until he managed to get it sorted regardless of how long it took. He took no breaks, despite my efforts to get him to do so, but was glad of frequent mugs of tea. Jim's expertise, experience and efficiency was very evident. He was always punctual and cleared up afterwards. Although the work took many hours longer than he had anticipated due to the many problems his quotation remained the same, for which I was so relieved and grateful. On completion of the work I quickly received all paperwork - documents, certificates, receipts etc. I have no hesitation in highly recommending Jim Mercer from MTS (11/10!)