These headphones performed well for listening to music, with plenty of power and natural sound up through 70% volume. The bass tones were slightly muted, but not as much as you'd expect for small drivers.
My complaints are largely to do with fit. These headphones are the on-the-ear type, as opposed to over-the-ear. This means they are somewhat predisposed to moving off the ear. Because they seem to be designed for a smaller head, these headphones move around a lot. Also size/design related, the boom microphone wants to contact my cheek. I was able to position it about 1 inch above my mouth to avoid this issue, but still have a working headset. Loss of star is for these fitment issues.
At 70 bucks, considering the fitment issues, I am very tempted to leave 3 stars. But given that the fact of on-ear design was knowable from the ad, and the relatively high quality audio response, I'll leave it at 4 for now.