Hard to say, it all depends on individual installations, the choice of which boiler we recommend depends on many things, I have only seen two intergas boilers in a working environment, they were both extremely poor installs so not fair for me to comment on how good the boilers are, we all have our favourites for one reason or another, personally I promote a brand that I have very good relations with the manufacturer and I know with all these extended warranties, if I call in a fault it will be sorted no problem, to me that is my best selling point of a manufacturer, and I get the service of the boiler every year to uphold the warranty conditions, too many manus will try everything to get out of the warranty and charge customers for repairs, I think that the Intergas is a decent boiler, is it the best ? as said too many variables, take Worcester for example, fantastic after sales support, but they need it as they are very poor quality but spend fortunes on after sales so the public think they are goodMaybe he is, but is Intergas the gold standard in boiler technology ?