Unfortunately, the water kettle I have is probably on its last days. While it is supposed to cut off once boiling temp achieved, it actually continues long enough to boil off a cup or two, which is pretty annoying. I've probably already gotten more than the lifespan (expected) out of it from the current (pretty awful) reviews of this electric particular kettle... I do like the different temperature selections of it, though, since I drink a lot of green and white teas that steep at lower temps versus boiling for black teas, so I would probably want to at least replace it with a similar model.I also switched to the pour-over filter method of making coffee, which requires boiling water--when my last drip coffee maker bit the dust a few months ago. For all this, I tend not to use my frequently malfunctioning electric cooktop burners (need to be replaced when I finally remodel the kitchen).
The idea of the heated dispenser came from friends who have had one for probably a decade and always talk about it being one of their favorite kitchen items, since they are big tea, cocoa, and pour-over coffee drinkers. Apparently they are very long-lasting. But for me, my interest piqued because I got an unexpected promo coupon for $30 off of this particular model, good for the next few days (and I'm anticipating my current kettle to bite the dust soon). But, since it is sort of a decade long investment, I feel like the energy efficiency needs to enter into my decision...
I guess the usage estimates you found in the comments (thanks!) might be ok or even low compared to that used when I run the tap to get water hot to pre-heat cups and thermoses--in addition to the electric water kettle. A little hard for me to judge, but it does cause the water heater to engage...