Pros: Price, Fit, Sound
Cons: I found better, more expensive IEM's
I owned these for years; and they, along with a JDS labs CMOY amp and my iPod, were my daily commute set-up. They offered everything I wanted in a portable rig; great fit, excellent noise reduction, superb and natural sound. I liked the small size, and the fact that they were barely noticeable when worn correctly. I replaced them after a few years with a pair of Shures that sounded even better; but cost 3x as much.