I was blown away by the sound quality of these headphones. I have heard a lot of negative stuff about beats being really bass heavy but these were nice, on the other hand they were not very durable and almost broke the the first day when i dropped them...But they are still good headphones.
Disclaimer: I did not buy my Beats at full price (got them second hand for £90). Personally, I don't think they're worth the £250 RRP price tag. Beats in general get a lot of hate because the high prices reflect the brand, not necessarily the sound. That said, with active noise cancelling, a very nice aesthetic, boosted bass (which although means I'd probably not use them for actual studio use, despite the name, makes them great for casual music enjoyment), and comfortable over ear fit, I really like them. I'll deal with the dirty looks from fellow audiophiles, for what I got mine for, they're pretty solid.
Probably the best beats headphones on the market right now.You get a lot of accessories and a top-notch traveling case. These destroys any other beats headphones in sound quality. It is a little pricey though but it perfect if you're a bass head like me.