Good sound clarity, strong bass, pretty effective at blocking out external sound (noisy tube passengers in particular) - the only drawback is the sound of whistling wind when you walk, on lower volume (less a problem at higher volume), otherwise - very impressed. In fact I'm about to buy my girlfriend a pair..
just bought a pair of these and am hearing things in the music I never heard before, even other Sony phones I've had. I am amazed, comforatable to wear and little wind noise when out on the bike. I dont usually do reviews and am suspicious of some, but these are so fab I had to say so.
Iv owned 2 sets off sonys before and have done me well untill they broke, because of old age and well used. so these are my new ones and there great, great sound quality n bass, the best bit though is the feel and comfort in the ears, a must have!!
Look no further if you want genuinely good yet very reasonably priced headphones. Very comfortable, easy to keep tidy, easy to untangle if they ever do get tangled up, excellent sound quality, gets rid of any background noise and very durable. All this for just a tenner. Can't say fairer than that.