Koss good

Somewhat in the shadow of its big (and old) brother (the PORTAPRO), this model is very comfortable and more discreet. Personally I love the black headband!
As for the sound, I would not launch myself in technical and subjective comparisons. It is good, good bass. The rest is a matter of taste or ears, and listen to MP3 in the underground, is nickel (the headset is called semi-closed, it is not totally cut off from the rest of the world). It does not slip on the head and fits perfectly.

Three important points.
It is supposed to be worn interchangeably hoop on the head or behind the neck. Impossible behind the neck, it's slippery, it is not used enough at home, and son are limits on the cheek, so so ... bad. I do not put it 5 stars because this way. It was for me a buying criterion to base.
The price of this product varies greatly from retailer to another. I jumped on it when I saw elsewhere sums ranging from double to almost triple!
And warranty (lifetime) Koss.