Get the perfect fit is not the easiest thing. The first step is find the right ear tips, the ones that came installed are so uncomfortable. The next step is learn how to use the secure loop system. Once this is done, the headphones are amazing, they produce an outstanding sound that will give a lot of life to any music track. Bowers & Wilkins people were not kidding about the slogan "concert for one". I don't know why the reviews say things like "they have a balanced sound", thats not true. Although the headphones produce nice and clear treble and great mid frequencies, the low ones have a clear predominance and sometimes the bass goes a little far. This is not a complain, the bass is high quality and its a joy to listen. The only flaw in sound department is the microphonics, there are huge amount of it, the good thing here is that when music start the problem stop.Regarding to comfort there are not complains. The headphones stay in place for hours while not hurting the ears, they just work the way is supposed to.Update: Durability is an issue, my pair just lasted a year and two months despite I treated them nice and carefully. Conclusion: The sound is great, but the durability is so poor.