"Two great brands team up to make a great product."4.0 starson by rabaemma
Pros: Very lightweight, cheap (compared to other bluetooth headsets), great sound quality, great headset functionality
Cons: The battery only lasts about 5 hours on a full charge. There are no options for alternative earbud tips.
Summary: I previously owned the Motorola S9 HD. They broke when the fell off the back of my head onto a carpeted floor. Wow.
I ordered the Altec Lansing/Plantronics Backbeat 903/906 that same day (the 906 comes with a 3.5mm bluetooth dongle). The sound quality is far better than that of the S9 HD. Also, the bluetooth connection was a lot more stable, even outdoors. The S9 HD was a pretty discrete model, and the Backbeat 903/906 improves on that being lighter and more flexible, especially the part that goes behind your neck.
Besides the kind of short battery life on a single charge, the volume switch feels a little flimsy. Also, as with the S9 HD, it is a little uncomfortable to lay down with these on.
Taking price, sound quality, and mobility into consideratin, I'd say the Altec Lansing/Plantronics Backbeat 903/906 is the best option available.