A comment
In our house, very often hot water is turned off, in fact because of this, a Delimano instantaneous water heater was purchased. The price for it really bites, but health and comfort should be in the first place.
I installed it myself, there is nothing complicated there, besides, understandable installation instructions are attached. The complete set of the water heater is not bad, it includes: a nut, a gasket, a fastener and of course the heater itself with a cable. There was only one unpleasant moment during installation, the cable was very short, 50 cm in total, so I had to buy an extension cord separately.
Of course, the crane is more comfortable with the crane, although if you plan to use it constantly, it will be more practical to buy a boiler. It works smoothly, though the design's fragility is a bit confusing, I hope that the instantaneous water heater will serve me for several years.
pros
Always warm tap water, easy to install
Minuses
Unreliable fastening, significant power consumption