Have one of these in service at work. Got it off Craigslist and rigged it to work only from the cold supply. (my office is an old auto shop in a high school built in the 1940s, the only easy tap in was an old water fountain) Its been in service for nearly 3 years now, at least one load of coffee mugs, small plates and stainless coffee filters every day. Sani-Mode heats the water to near scalding, even from mains cold, and it will deform certain plastics. Had an issue with the gasket around the window which we solved with silicone sealant. Occasionally the timer will stick and the machine will run for a few hours. Other than that, the little machine has worked it butt off and does a wonderful job making sure we're not trading germs in the office.