Our oil boiler broke down two days before Christmas leaving us with no hot water or heating. We called SGS hoping they could get an engineer out to us in the New Year but were delighted when an engineer attended on the 27th. He managed to get the water back on but due to the age of the boiler the heating was a no go. This being the case we decided to replace our 20 year old boiler with a modern, more efficient model. The quote was received within a couple of days, the prices were fair and the engineers arrived, as promised, on the 7th January. The whole job was completed within the day and the standard of workmanship was excellent. We are very pleased with the outcome and do not hesitate to recommend SGS. Great service and back up.