I have now tested this kettle for a few days and already extensively. He boils the water really quickly and the color change thereby really great (like the pictures). This is the first kettle, which I watch the cook :-). He makes a solid and sophisticated look. And he also did not smell of plastic when I unpacked it. But in spite of everything 2 cans cook so that first some cleaning was there. I'm super happy with this beautiful kettle. And the price is also OK. And thank you also for the fast delivery, he was in grad times 2 days with me, so it could still try before the holiday ... :-)
Addendum of 16/03/2015:
The kettle is still working properly ... no short circuit and a beautiful color changing ...!