Works flawlessly with OnePlus One, sound very neat

Design and processing: very good
The headphones are very similar to the Apple apple earbuds, bring it over, however, some crucial advantages with.
For one thing, Amazon headset features from the splitter / remote control on a flat cable, which is far less prone to complications than the apple earbuds or all other in-ears or earbuds I've ever used (I have a total of 7 pairs).
In addition, the earphones are magnetic and can be joined together for transport, which further reduces the possibility of Verkuddelns.
Two very useful and thoughtful features in my opinion.

Function: very good
All functions of the 3-button remote control will go to my OPO:
Play / Pause - one-time pressure on the middle button
Previous track - twice pressing the middle button
Next Track - a three-time pressure on the middle button
Volume up / down - using the +/- keys
Only forward and rewind I yet do not get, but that is probably more on the phone or audio player used (Rocket Player), as the headset.

Sound: good-very good
The apple earbuds also very similar, with a slightly lower (but still significant) boosted bass. The sound I would describe as warm, but quite detailed. For me personally missing here and there a little treble, but that is partly also at the reception. For the most predominantly mobile applications more than sufficient.

Conclusion: the Amazon headphones are worth an absolute recommendation for the called money and play sound well above their price range.
These compatibility comes with many (most?) Android devices, which is certainly also not a foregone conclusion.

All in all, a strong buy recommendation from me!