Not suitable for runners

Now I understand why Sony in advertising shows only swimmers and rowers. For runners who probably represent the largest group of interested parties, the MP3 player is not suitable. At each step, the housing wiggle the ear, so that although they do not fall, but generate by the tight fit in the ear canal a dull tone that almost drowned out the actual music. So primarily you can hear running himself. I was so disturbed by the few hundred meters that I have turned off the device. If you look at the design, one can understand that: rigid earplugs, 2 cm offset from the fixing of the bracket, which is too soft but for a tight fit.

The smaller defects are thus really beside the point:
- Shop only docking station, not over default port as USB
- Shuffle function only of the entire contents, not for individual folders (workaround on Sony-proprietary playlists that you can generate for each folder / needs)
- Unpleasant to wear, you can feel the player with every head movement
- Enclosed manual unusable online version incomplete
- Packaging that is only destructive to open, making a return impossible.

Anyone who wants to play with the player does not run but actually swimming, rowing or perhaps chess, may be more or less satisfied. For me he is a nuisance. Too bad, because the basic idea is good.