Ergonomics:
According to some reviews, it irritates the ear after a jog or otherwise and / or does not hold good ear.
You are aware that it depends on the proportions of your ears.
For my part, I often jog (also in the rain) and it holds.
Sometimes friction irritate a bit at first but after we do even more careful.
If not for maintainability, I tested the family who regularly listens to music, it holds well.
Sometimes it tries to escape (as virtually all headphones) but show him who is the master.
Sound:
If you are a purist, forget it.
If you are on low purists, forget it.
Otherwise I assure you, the sound is correct in the sense that it is not distorted, and music will arrive
yet to carry yourself through that.
CONCLUSION:
We want a cheap trick that holds and that we properly balance our pseudo-music without expecting the HQ.
Well, buy this.