Punctual and speedy installation that whilst it did have it's problems were solved just as quickly. No problems with the installation, only with the boiler itself with broke down within 2 days. When problem was reported, Robert appeared with 15 minutes despite it being 8pm on a Sunday night! Boiler fixed under warranty by the manufacturer, with another small issue sorted quickly by Robert. Would I recommend him? Yes. I've already agreed to him to come and perform the annual service.