Pros:
Look good
Microphone/pause play button is situated at the perfect height
Quality of the microphone is excellent
Very good value cheaper than the apple in-ear headphones and with all the same features as the volume control doesn't work on the iPhone 3G
Great at blocking out background noise can hear very little even without music playing.
Good sound quality
Easy to use - 1 click = pause/play or answer calls, 2 clicks = skip forwards, 3 clicks = skip backwards
Comes with 3 sets of earbuds (S/M/L)
Also comes with a really handy carrying case
Cons:
Took a couple days for my ears to get used to the headphones even the smallest buds were slightly too big for my ears but now they are really comfortable
No information on whether they were asymmetric or symmetric, they are symmetric headphones
There are not many in ear headphones compatible with the iPhone out there and these are by far the best value for money. They are £20 cheaper than the apple in-ear headphones and do the same job do i need to say anymore?