I have been using hot water dispensers for a few years. The first one I had was very basic, one single temperature and no cut out when filling cups/mugs. Had to keep a watch on it or it overflowed.
The one I have now was more expensive to buy, but has several different temperatures, and can fill either non=-stop, or else at 100/200/300ml at the time. Must say, that after first few weeks of playing with different heats for different beverages, really only use the highest one now.
It is extremely cheap to run, only uses power when actually being used. Rest of time it remains on, but not taking any power. It does have a drip tray for mugs/cups, and this is easily removed to put under the dispenser things like saucepans. It is very safe to use, no picking up or even tipping a heavy hot water container.
Do need space on worktop for this, but well worthwhile. I would recommend them, but would advise doing research, sometimes the very cheap ones or not really worth it