assloads of cost for installation

I installed it myself, the instructions were pretty straight forward, the piping all flexible (no braised copper). and I'm not really that handy.

wasted energy: this is something I've thought about; it generally cycles after dispensing, but sometimes you'll hear it heating; I could put it on a timer so it's not warming water in the middle of the night I guess....

but it's reservoir is insulated, so it's not the energy waste you'd think, especially compared to stove heating water / multiple kettles per day.