Pros good quality sound (nice bass, miss, treble etc), great design, very Comfortable, cool features including noise canceling and the light on the sides of the headphones.
Cons sometimes interfere with signals (on the plane, radio etc when the noise canceling is turned on.)
Summary Great Pair of headphones, better than studios, i was impressed with them.
Pros Workmanship, quality sound, enhanced for use with iPod/iPad.
Cons None thus far unless you count the stereotypical generalizations associated with wearing or using a product endorsed by an entertainer/rapper.
Summary I recently returned a pair of Beats by Dre (Studio Version) for poor performance and shoddy workmanship of the carry case. After replacing once Best Buy tried to get me to take another pair but I refused and we compromised with a refund to a gift card instead. I used that gift card for a pair of Soul by Ludacris SL300's. Enough said...