We purchased the AQUAH 12L heater about 6 weeks ago to replace a leaking old fashion tank hot water heater. Took a little adjustments to get the temp right but after that it has been GREAT!!! We have 3 children and used to be showers, baths, and washing had to be space out to allow the tank to reheat but now we can just keep hopping in the shower. Service was good and it arrived in the time frame they told me. The cost was about 1/3 of what one was going to cost locally. I have recommended the heater and the company to several friends. Note that I have no relationship with the company. Just wanted to pass along a good experience.