Owner of a tankless water heater
I bought one tankless water heater for my brand knew home I built for myself in 1999. It made it 2 years, then the mother board went out, I went through 3 boards mailed to be, after the 4th board I gave up. Luckily I put in a normal 50 gallon water heater as a back up. I just replaced that 50 was looking into the tankless again, I worked good when it worked.
I figured after all these years they may have improved them but by looking at the reviews. I don't know how they can still be in business. It's a shame, I build homes for a living and was hoping to see these work better.
So far I have not seen nor heard to much positive words from anyone that has had one for more than 2 years without any problems.