I received a pair of these from a promotion so I'm glad I didn't pay for them, not that they're bad, but they're too small.
The build quality is fine, they seem pretty solid and deaden noise pretty well, but unfortunately, they are not "one size fits all".
If you have a large head, you'll fine that the strap isn't quite long enough, consequently the metal frames tend to press against the skull around the temples, which is really quite uncomfortable.