For the price, the comfort and build quality are excellent, and on par with many headphones two or three times the price. They are very light and the updated auto-adjusting headband mechanism works very well. The cord is fixed and pretty long, but these are definitely intended for home use anyway. Cord quality is fine and the screw-on 6.3mm adapter is very robust.
However, it's the sound where these fail to live up to my expections. For a closed-back pair, it's fairly spacious and instrument separation is decent. Again, for the price, better than many headphones out there. But these don't really fare well for mixing or critical listening purposes because of their coloured sound. There is simply too much mid/upper bass and lower mids that they make the sound muddy and hinders clarity. The bass is not very tight, so I wouldn't call these bass-head headphones either.
The sound quality is twofold. If you are a fan of AKG's "house sound", like I am, these will probably disappoint you. But if you always thought AKG is all midrange and no bass, these might work for you. For the price, these make for alright reserve headphones or even primary if you prefer your sound with thick upper bass and lower midrange.