james naywrote a review of Beats by Dre Beats by Dre Studio High-Definition Headphones on January 15, 2012
I'm a sound engineer and have tried dozens and dozens of headphones. I'm always interesting in trying new gear to see if I can find anything to surplant my classic Sony Studio Pro MDR-V6, or Sennheisers or Audio Technica headphones.
While these are nice sounding headphones, compared to other headphones in the same price range, made by truly reputable, long running headphone makers, these fall short sound quality-wise.
On a scale of 1-10 these would rate about a 6.5 or 7. Most people are used to your run-of-the-mill department store headphones (skullcandy, sony, etc) and compared to those, these sound worlds better, however if you compared these to truly good headphones then you'd hear what you're missing. These have a good bass response but are lacking elsewhere. The bass is overwhelming and you miss a good part of the rest of the spectrum. (mids and highs) Apparently young listeners think a strong bass equates to great sound quality. They don't know what they are missing.
If bass and style is all you care about, and over spending for headphones is your thing, then go ahead and get them. If you want the best sound for the price and don't care about what your peers think then you can get better and more natural sounding headphones for less, probably half as much.
This is a good article that'll explain it more: http://audioproheadphones.blogspot.com/2011/07/headphone-popularity.html