I've had 3 Insinkerator Hot water dispensers over the past 30 years and have always enjoyed having them handy. I've installed 2 of them - no issue. 

I did have to call for warranty service / replacement of the tank because the water would not get hot enough and I had the thermostat almost to the very top end.

I will still recommend this product because they are reliable and they work work 
well over time. The warranty was also honored and with ease..