Over the years we have had 5 of the Insinkerator Hot water dispensers and they have all provided instant hot water as advertised. My only warning to other purchasers is that these hot water dispensers become faulty shortly after the warranty has lapsed. We rely on the instant hot water which is why we have continually replaced the non-working model as soon as it stopped functioning as expected. It seems the lifespan of these products is 3.5 to 4.5 years - maybe it is planned obsolescence.