I've had some odd build quality problems with mine. The first thing was the included 1/4 inch adapter breaking when I was unpluged them from my gilmore V2, leaving half the plug still in the socket, had to use pliers to remove them as all that was sticking out was some cheapo plastic part that insulates the tip. That happened a while back, last january I think. More recently in august last year one of the wires in the left earcup broke off from the solder contact point, and i had to resolder it on. The strain relief on the earcup is also gone. I'm assuming this was from contact with whatever the green stuff they put on the wires is, flux or an anticorrosive or something. The green stuff tends to leak out whenever it's warm, and the stress relief sort of fell off bit by bit after I first noticed it. From a sound quality perspective however I still like them, they have enough kick, and fairly clean highs, great for solo or small string bands. If it's an orchestra though and there are lots of harmonics in the sound they seem to lose their musicality, you can still hear all the instruments, but it sounds more like noise than music. The only other gripe I have with them is just how open they are, though I suppose this goes for all open air headphones.
Edit: Don't take this as a purely negative post, they are very comfortable, and for most of the music I listen to they sound really good. Hopefully the issues I've seen with my pair are just a fluke.
