We replaced a Hot1 that had died. The main issue is that it requires a bigger hole for the faucet. I had to spend about a half hour with a drill and a grinding stone enlarging the hole in a granite counter top. Otherwise, the installation was fairly smooth. The faucet quality is much better, and the valve is regulating cold water into the tank rather than hot water out. This should make it last a lot longer. I would like to see more insulation in the jacket. It lets a lot of heat out under the counter. Overall it is a definite improvement from a Hot1.