I Decided on these 'phones after i read lots of positive reviews, when I first got them I noticed how well built they are, and I like how they flex in all directions - reducing the chance of snapping, a curse that haunts my friend with his Dr Dre hea...Read moredphones. They are very comfortable, although quite heavy, however they don't clamp very hard, this is generally good, but it means they slide off my head if I tilt it forward a lot.
Now, the important bit - sound quality. when I first tried them I admit I was concerned, my previous headphones were advertised as 'extra bass' so they were very muddy and deep, which is the opposite to these 'phones. At first I was worried because I wasn't used to the clean and detailed treble and mids, on top of this the highs sounded a little harsh at first. I left them playing for about 50 hours straight, which improved them infinately! Now they have very clean treble, the bass has tightened up, and the mids are very warm sounding. Right now they sound very nice, I listen to all types of music, from hip hop to drum and bass to heavy metal to classical, and they seem to work well for all genres. One thing though, for heavy metal and classical type music, I like to increase the bass a tiny bit on Winamp, to give them the same depth that my previous headphones had, but this might not apply to people used to ipod earbuds and other cheap earphones.
general product quality = excellent
comfort = very good
sound isolation = good
sound quality = very good