So far, no complaints with this water heater. I replaced a much more expensive unit with this one. The previous unit had the same voltage and breaker requirements, as well as similar water connections, so instillation for me was fairly simple. Performance wise, the Ecotouch heater does great, especially in my house where it typically only runs one fixture or appliance at a time. I have not experienced any cold shots of water while operating like my old water heater used to. Design wise, I like how this unit is set up, it uses a continuous metal water line with the heating element surrounding the water line. All previous on demand water heaters that I've used have had small reservoirs with the heating element submerged within the reservoirs. The Ecotouch design seem less likely to foul up with minerals in my opinion, but time will tell. Very pleased with this water heater so far, wish I'd tried this one first.