I use the headphones to my smartphone for fortuitous music and podcasts. Furthermore, I use them also on handheld video games and the laptop to watch videos.
The processing of the headphones is decent. I like it very much that the left has three Knubbel Headphones outside, so you can not look up to recognize what headphones left and which is right. I think the rubber caps very convenient (I use most often S or M). However, these are compared to other Kopfhöhrern rapidly soluble, therefore they can fall off during rapid pull out of his pocket and quite lost.
Since the headphones are used very intensively with me, they wear out very quickly and rarely hold for 2 years. But that is all Kopfhöhrern so and is likely to use my way (which is why I would buy any headphones that cost more than 30).
The sound quality I find very good for my needs. Certainly there are far better headphones, but for the price range they're really okay. I buy these headphones for many years repeatedly and they have begun in the price range around the 40 and now they cost less than half. For 40, I would no longer buy these headphones, as you can now get even far better products in this price range. For the offered 16.89, it is a good product, which I would not hesitate to recommend it.