Then I stumbled across this marvel. With Bluetooth and then even to 15 euros, I thought the thing can indeed only be nonsense, but was curious and have ordered it anyway (my demands for sound etc are for Sport Headphones not high).
Then the headphones arrived today and I am frankly blown away: processing, sound, operation have exceeded my expectations to 100 times, where to find such a thing today?
Package came for lunch, since I barely saved the headphones, the battery lasts definitely longer than the player (Nexus 4), because that has to be already loaded.
In sport the headset sits perfectly and presses even after one hour does not, apparently I got the perfect head shape, because it is not adjustable, but only "fairly flexible". The pairing work right away and also the voice of the running app comes clear.
In hindsight I'm really glad that I bought wireless headphones, and still not get a surprise out. The only bitter aftertaste for me: if such a quality at this price is going to have as much then gets from the hard-working guy who could build this thing together ...
In this sense, but purely from a qualitative point of view still a strong buy recommendation!
PS: calling also works quite well, even if you have to speak louder to be understood in order.
