What can I say, I've never seen a kettle of aufheitz as fast as this. If only 0.5L of water are needed, maybe it takes 30 seconds it cooks. After almost five seconds before rising to the first bubbles.
The lighting inside is a nice gimmick, you do not really, but helps to see through the window how far the warming process has progressed.
The descaling is also very fast and easy, a small amount of liquid descaler purely empty and swing something rinse wait, done.