Conclusion: Great deal on this! Easy to pair, good quality. VERY happy with these. the only thing i would think about changing on these is i wish it had a little bit further range that it could get from the source. So far, i have not found a bluetooth device that can go 50ft. Then i wouldnt have to carry my iPhone in my pocket at the gym.
Pros: Great sound, easily converts between mono and stereo. Great battery life, easy to wear, and charge. Mic picks up voice well. Stereo ear buds are very comfortable and do a great job of blocking outside noise.
Summary: Here's the deal -- I primarily listen to podcasts, iTunesU etc. so I don't need stereo sound all the time. I've been looking for years for an earbud that will stream this stuff so I don't need to bring the wired variety or the bulky wireless stereo buds. FINALLY here it is! I can keep the 870 in one ear so I can hear what's going on around me and yet, I can stream what I want in the other. If I want to listen to music, the stereo attachment works perfectly.
Pros: Clear Signal, Comfortable, Durable, Easy To Use, Good Volume Control, Long Battery Life, Mono-streaming
Summary: This is my first bluetooth headset, so I don't have anything to compare it to. I really can't complain about anything given the price after rebate was under $20. Connected easily to a LG Dare and Motorola VU204. Sounds clear on both ends using headset only. Music sounds decent through earbuds, but not great. Haven't tried calls with the earbud/lanyard yet.