Pros: Bass, detail, portability
Cons: Comfort, soundstage
I've bought these because I needed a bass-pronounced headphone since all I had back then was an AKG K242HD that pretty much doesn't have any bass at all.
These headphones are absolutely spectacular if you listen to trance, drum n bass, dubstep and even metal. I just listened to SBTRKT's last album and I really enjoyed it. The bass is tight, precise and detailed (sometimes even a bit too punchy for me, i get headaches, ahah), something you may like or not. The mids are present and you can hear everything without any problem. The highs are sparkling and really pleasant. By the way, these headphones can get a little too harsh for me if you turn the volume up a little bit, so you might need to eq to your taste. If you listen to classical, jazz, ambient don't get them. The soundstage is really small compared to my AKGs and they sound unnatural on these genres.
This is my first review and I'm not english so please don't be too hard