If you use the kettle for 2 minutes 10 times a day that's about a kWh.So presumably you'll save a quid or so a week less whatever comes off your feed in payments.
I can do without another gadget - would you get rid of the kettle?
I suppose it's like having a non-plumbed boily-water-tap. I haven't bothered with one of those for the new house, I was warned off having one in a hard water area.
A few years ago there was a gadget that used instantaneous heating to dispense hot water. We abandoned it quite quickly.
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