If you're the kind of person who instinctively reaches for the BASS BOOST button on your stereo, then these headphones are for you.
The bass is almost overwhelming at times and tends to overpower the sound. The tone seems very "warm" in general and the sound lacks the clarity of more expensive phones. Comparing these to some other similar priced phones these sound a little "veiled" but at the same time seem the bring you closer into the music - I'm sure there's an audiophile term for that but I don't know what it is.
In terms of design they get a big plus for being EXTREMELY comfortable to wear for long periods. They also have a ridiculously long (10ft or something) cable which I like.
In general I think for crisp and accurate music reproduction these are not the phones to get, but the heavy bass and comfort make these my phones of choice for gaming.