After several failed attempts at fixing my boiler, I looked on WHICH and found Mr. Crawley's company. I contacted him explaining the past issues of dodgy engineers and he gave me a date for a week later. Whilst explaining my ordeals, he encouraged me to go with Vaillant directly. I thought this a little strange. Anyhow, I looked into it but still gave Mr. Crawley the job as he seemed like a good company to promote due to the reviews. He visited, but didn't have a PCB board, despite me saying beforehand via email and telephone, that the previous plumbers said it was in need of a new PCB and PRV. After his on-site investigation, he called and quoted £500.00 for only the PCB part. That sounded expensive for a Vaillant Ecotec Pro 24. I found the new part online for a max price of £275.60 brand new, plus received a quote for my serial number, make and model for £180.00 (details shared with Mr. Crawley after he questioned where). Mr. Crawley's response was, "So why don't you get them back then", but I had already explained that there was a safe guarding issue, and an inflated price on the part, hence why I didn't. He still persisted that I should go with Vaillant, and at this point I said "OK". He charged me £72.00 for no value-add at all. Refund? My boiler was fixed the following day by Vaillant, who changed the PCB and PRV for a lot less than Mr. Crawley's quote, and gave me 6 month's cover via D&G. So you do the math. It was cheaper, quicker and service was courteous and honest.