Pretty good, except I have to say the bass is a little bit too much. The chord is short though, too short for a jacket pocket, so on the go, I'll sometimes steal these from one of my family members (there are at least two in my house).
Did I say the Bose headphones had a little bit of a problem with boosting bass? Yeah, these have a lot more than a little bit of a problem, but the sound quality on both headphones is amazing, especially the Bose ones. At least they're not beats.
That being said, if anyone knows of headphones that have as great separation, sound quality, and bass (without boosting it) as the bose headphones do, tell me because they're starting to fall apart and I'm a bit of a headphone n00b compared to most of you. I mean, I've never listened to ultrasounds or seinheisers so...