Looked at it several times. Lot of you get what you pay for with tankless water heaters. They are unlimited within the output capacity, i.e. cheapest one will provide for one tap at a time.
They avoid storage costs and wasteful reheating
generally more expensive to install
those with teenage daughters may want to reconsider
Mine judged herself clean when the tank ran out of hot water.
If I were replacing my tank tomorrow, I'd take another really hard look at one.