I recommend Arzum Leziz for every home
it stop the water always hot when you use hot stop function. If there is no more water in it, it switches itself off. And water level indicator is made of cheap plastic none I believe. This sculpture in the inner side consists of two small dots (about 1 mm) so the water can run through water level indicator.
Blue is, keeping warm function
Red is, it boils the water
After water is boiled, is keeping warm function automatically enabled. In other words, you have to turn it off when keeping warm function will not use. I think it is not bad, quite Pratik. There is also no risk if you forget it, because kettle will not work without water