We have had instant hot water units for the last 25+ years in 3 different homes. I don't remember if the first two were the same brand (Instant Hot comes to mind) or not, but the last three were. In our last home the unit we installed when we built the house finally died after thirteen years. We replaced it with the same make/model that we just installed into our new house. I really like the easily accessable thermostat on these new models. You can easly get the temp exactly where you want it. Great product. Keep the quality high like this and you won't have any trouble selling them.