Wear after 6 months (experience)

These headphones were after a long search the only ones who have passed on my needs. One can argue about the sound known, but since I have the Sony MDR-XB500 had previously, have made exactly my taste.
But my initial euphoria was slowed after only 3 months moderate Gebrauche (usually on the PC), as revealed serious quality defects. I do not know why that hardly anyone writes in the reviews.
-> 3 problem areas:
- Jack is after about 50 times a / unplug so worn that it generates feedback when mated.
- The hinges and joints begin after only 3 months very strongly to creak and wobble -> It's enough to move light head that drowned the creaking music (100%).
- The ear pads are not made of leather but from an inexpensive, very thin rubber. Feels good though on, you will notice that at the edges but now cracks and dissolves. (In my old Sony that happened only after 4 years.)

Since I have the Sony took only 1-2 times on the train and then only in a hard case of wear can not get away with it as well.

------------- POSITIVE:
+ Great bass-heavy sound of Beats Solo level of house, electro and hip hop
+ Ribbon cable (not kinked and tangled not)
+ Ear parts separately rotatable
+ Can be folded very compact (fits well in hardcase)
+ Very stylish in white
+ Very comfortable earpads
+ Easy and platzspaarend
+ Suitable for large heads
+ Single-sided cable
+ Good value for money (40)

-------------- NEGATIVE:
- Is (hardly possible cleaning) even at indoor use very quickly dirty
- Hinges & Joints creak after a short time (even the slightest head movement)
- Earcups dissolve after a few months already -> high wear
- Plug created when stuck often feedback

------------- CONCLUSION:

The negative points are unfortunately so severe that I so can not continue to use the headset.

Since this is so is no production fault, but a massive quality problem, I will withdraw my money and XB500 use my 5years old Sony on.

No purchase recommendation, unfortunately.