Sound - doesn't bother me at any style I play - from hard, through electro, to classical etc. I am not a musician.
Comfort - very comfortable, but for me are too tight (and I don't really have a big head). You can notice in the description, that they are heavy, but you dont feel that, since they fit quite comfortably on your head.
Quality - it's a very low cost headset, that actually feels quite durable. As I meantioned above, they are a bit heavy, which, I'd quess, comes with the stronger materials? The cable feels strong too and it is coiled, which is important for a forgetful monster like me. Also they dont look like a big satelite on your head, despite that they are over-ears. And have a nice color, that actually looks quite shitty in real life : ) But I'd still prefer it to black.
Bottom line - great bargain for a simple user.