I've had my PMX 100s for a month now, and already they're in pieces. The mechanism used to hold the driver to the neckband isn't very good and is not meant to be repairable. The drivers also wobble around. Once they come out of the neckband, it's game over. The foam pads easily fall off as well. And the comfort? ...What comfort? These are less comfortable than almost any other neckband style headphone I have worn.The sound quality is OK (perhaps spoiled as I am used to higher end cans like the HD600), but the durability and lack of comfort make these cans unwearable and unusable.