I have Sennheiser HD205, Sennheiser HD419 and now these absolute beauties! By far the best headphones I have ever used with nearly all genres. They are perfect for me, fit my every need perfectly.
The Advantages: Design is absolutely fantastic Build quality is top notch Trebles and mids are spot on Decent sound cancellation Doesn't leak any sound 6.3mm Jack adapter Extension lead Carry case
The Disadvantages: Bass seems a little weak Cable isn't detachable
As you can see, there is a long list of advantages and a short amount of disadvantages. That is always a good way to go.
Unfortunately, people who listen to bass-heavy songs aren't going to make these there first choice. By no means is the bass bad, in actual fact, its much better on here than on HD205's and not far short of that on the HD419(a headphone designed with bass as the primary focus). I listen occasionally to bass heavy songs and it does cope very well. However, for this price you can find better bass in a headphone.
As I have mentioned, the cable isn't detachable. This, of course, isn't a major problem. However it might have been nice on headphones in this price range, as other headphones do have. I doubt whether this will affect your decision at all, but worth keeping in mind.
I will only touch on audio quality, as the rest of the advantages are pretty self-explanatory. I find the audio quality amazing. I think it delivers 'incredible sound detail and clarity' (as described in the product name). I works splendidly with rock, dance, indie, hip hop, classical, techno, drum and bass, rap and dubstep. Some of the latter genres don't work as well as the first, but still fine for the average listener.
In conclusion, a listener with an all-round genre liking with suit these headphones perfectly. They produce fantastic highs and mids and pretty good bass. All with an even balance, creating an all-round headphone. People who prefer more bass may want to look elsewhere, as they aren't specifically designed for that. Overall an incredible set of headphones. Would recommend to just about everyone!