I’m having a tankless water heater installed in my condo now. The guy did the wiring today, which involved replacing a circuit breaker, and he’ll be back tomorrow to install the actual heater. He left the old heater in place so I’ll still have hot water tonight. Right now my kitchen is a mess, with holes in the wall and wiring conduits sticking out.
A lot of my neighbors have tankless water heaters and they’re very happy with them. It takes up a lot less space than the old water heater, which will let me put another cabinet in my kitchen, and they use a lot less electricity since they only heat the water as needed.