I paired these with a Blackjack. The sound quality for speaking is good, people I spoke with didn't notice I was using a headset. For music, the sound quality is average (I'm used to Etymotics and Shure headphones, which are great), but the functionality makes up for it. I used these while working out and snowboarding. The wireless freedom is great. For snowboarding, having the button to pause on the right ear is also great, and having the last dialed button on the left ear to switch from music to calling back the last person I spoke with, was great on the slopes. Didn't have to take my gloves off.I only give it 4 stars because the music sound quality has room to improve. i'm guessing high quality bluetooth headphones (when they come out) are going to be double the price at least though.