The most attractive feature is the ability to run this on a standard household 15-amp outlet. This allows me to install this in my off-grid building that uses solar power paired with a 3000-watt inverter. It is rated as using 1440 watts, and during my initial testing the 3000-watt inverter was able to run it, even with the added startup or surge power draw. I let it run for about 30 minutes and when I came back, I had hot water! It is also small enough to be neatly tucked away in a cabinet once I have time to set up permanently with the sink. Eventually I plan to use this primarily so I can install a heated outdoor shower for people to use before and after getting in the pool. It is very easy to hook up, and simple to operate. I am quite happy with its performance and the versatility with it operating on standard 120V, unlike most hot water heaters that require 220V. And so far, it has been working effectively and reliably!