I couldn't stand the noise the cable made when you were walking. It was unbearable after a few days of walking to campus. The black rubber piece under the earphone itself, where the cable attaches, needs to be longer to give the cable more "support" and prevent it from moving as much when you walk. Also, they didn't seem to fit in my ears as snug as other in-ear's, regardless of what size tip pieces I used.
I had to send this back after 2-3 days of use. Bought a pair of Shure SE-215 IEMs and haven't looked back.