My hot water system recently stopped working. I rang Andrew from AHA Gas and Plumbing who arrived at my place within half an hour. He determined it had come to the end of it's useful life and recommended I get it replaced. He advised approximate pricing and was back early that afternoon with a brand new system which he promptly installed, allowing our household to have hot showers that night! Can't rate him high enough...very efficient, good bloke, competitive pricing and all round awesome service. Can highly recommend!!