Good sound quality
Long, durable cable
Lightweight and small
Somewhat unimpressive bass
Not a tight fit on your head (fall off easily)
Poor durability if used at high volumes (I've had these headphones since about half way through June this year  and the headphones [internally] are beginning to wear out already [16th July 2009], I can hear a rattling noise in the right headphone if I shake them).
If I was given the choice between these and the Sony MDR-XD200's It'd be a tough choice but I think I'd pick the Sony's due to the better sound quality.