Pros: Excellent bass, airy for being a closed variant, build quality, warranty
Cons: Soundstage not on par compared to open headphones
If you listen to dance/club/dubstep/etc you will love these headphones. The bass is fantastic and there is clarity and detail in all spectrums. Soundstage is good for being a closed variant. However, when listening to acoustic recordings, they sometimes seem rather boring/analytical if comparing with headphones with an open design.
The build quality is really top-notch. The manufacturer offers a free 5 year warranty extension.
Comfort is good and they look classy. No specific amp is required, just connect them directly to your mobile device. The isolation is a plus whenever needed.
I use these primarily when listening to studio productions and prefer my modded Grado PS500 or Sony MPR-F1 when listening to acoustic recordings.