I have those paired with Creative Zxr and I am impressed with the quality of the sound. Some are saying the Zxr overwhelms with bass but I don't feel this. The bass is enough, it can be definitely felt but its absolutely not leaking into the mids. Those mids on the other hand... detailed, crisp full of dynamics and precision. And the hights - oh..  Listening to piano and violin concertos is so pleasant. Soundstage is wide and with the Zxr channel separation is very pronounced. The packaging is simple, there is nothing special there, Beyerdynamic could have included more "premium" carying bad/box but hey, for below 200$ this is what you get. The build quality on the other hand is very good. It feels sturdy and very solid. I am yet to see how this holds agains time. Comfort is remarkable, I nearly cannot feel them on my head. There is no discomfort both on the ears and the top of the head. The earpads are soft, almost velure like. It would look better with leather pads but comfort would likely suffer. Beyer could have included a leather kit in the box similarly to their 1770pro set. The only real downside of the headphones is the lack of replaceable cable. I would have really liked 1.2m straight cable for outdoor use. 

There are lots of bad reviews for those, however I must say that after properly calibrating them through an equilizer the muddy, cheap sound becomes much much better. In 7.1 mode for playing music those are absolutely horrendous, however if you use bass redirection and set crossover frequency at about 70hz they become quite nice. And if you use 2.0 mode you will need to play with the equilizer a bit to achieve nice results. Therefore you will need a proper sound card with equilizer settings.. I have been using them with SB Live! 24bit with modded drivers as well as with Asus Xonar U7.
The design is very very good, they are very well built and really comfortable. I can hardly feel them despite their size. Also they are durable with strong meshed cable. The pads are soft and don't cause any sweating.