Conclusion First of all: does what it should and is well worth the money.
Processing / Hardware Quality: Everyone knows that at the price not high-end needs expect materials - but again, everything is according to purposes and does what it should. I do not trust the headset to accompany me even longer without going broke.
Bluetooth: Running it can sometimes come at a crack - but I was accustomed from Bluetooth in quite higher frequency (previously max 2 times in 30 minutes.). Range varies greatly - up to the next room there is enough rare - but when one gets the man carries on there's no problems.
Sound quality: one in advance - I have no idea of sound and hear about as good as a fish). Nevertheless, my mustard: Sound is subjective significantly better than for example in my supplied with the smartphone (Samsung Note 3).. Especially bass come over more.
And the most important:
Comfort: The rubber holder have pleasantly surprised me - cool idea - works great - keeps Bombenfest. 3 different sizes are included in both the earpieces and the Heltern. So you have to try first bit, which combination does not bother even after a long gestation period and still firmly in place. After initial out, they are a faithful companion. I myself previously always had problems that the in-ears out slipped again or does not fit properly, the carrying system make it work great. One note: The plugs appear on the smallest size slightly larger than the average of Samsung - so they can be "Do not squeeze so far."