I got this set of earphones off eBay ($22) and I must say I'm loving it.
The problem with this earphones is not related to sound quality at all, but rather the ergonomics.
The cable is J-corded, i.e. asymmetrical, with the right side longer. My experience is that my right ear loses seal/earphones fall out when turning my head.
Looking at the post above, I attempted the rather simple (common sense, really! cable ties work great.) mod to turn it into a Y cord, and I must say the ergonomics improve remarkably.
With a Y-cord mod, I strongly recommend wearing it over-the-ear. The cable noise from movements reduces to a very acceptable level.
Lastly, YMMV, but while everyone's praising the stock tips, I can't get a good seal with them. M's too small, L's too large. I swapped my own dual-fanged tips in and isolation/fit improved noticeably.