They have an okay fit. I used to use the included small rubber tips and the fit was perfect. But sadly I lost those tips and used the medium tips for a while. They were a bit tricky. I found you had to stick them in your ear, then pull them slightly out to get a perfect fit. Now, I use Shure E2C foamies on them and it makes the bass and fit much better. It's a bit bass light IMO. It's a fairly neutral and sterile presentation IEM, especially compared to my UM3X. It lack a bit of bass impact and substance IMO but it's perfectly fine for a commute type IEM and the remote is insanely useful if you have an iPhone.
Decent option if you can get them for cheap.
Edited by dap_pad - 7/9/10 at 10:15pm