Not bad, as far as cheap over-ears go.
They're pretty stylish, light & comfortable and the socket on the left ear that allows you to remove the wire (handy for transport/replacing ruined wires) is a nice touch.
However, there is quite a bit of sound leakage; they have an unclear, woolly sort of sound to them (even after a good 24hr, pink-noise, burn-in session) - as though you're listening to your music through a wet sponge.
The DOWNRIGHT UGLY:
But most disappointing is the fact that when the volume is turned to just over half volume on my iPod Classic (admittedly with Bass Booster turned on), the speakers start to rattle & rasp, as though they want to blow. Unacceptable for headphones supposedly crafted for the disco bunnies & messheads of the Ministry of Sound. We like it LOUD.
They're cheap & relatively serviceable, but can't hack the pace.