Summary: I got these because they were REALLY cheap when I bought them. Set-up was easy, and the audio quality seems fine. The big drawback is the poor design. It doesn't really stay on your ear that well. The flimsy "clip on" style ear loop comes off too easily, and even when it's on, don't make any sudden head movements or the earbud will come out, and you'll just have a bluetooth set dangling awkwardly (if not precariously) from your ear!
Summary: The sound is fine. The button for connecting to the basic phone set doesn't always work as well as it should. The earpiece isn't very comfortable and keeps getting loose so it needs continual adjustments.
Summary: My first Blue-tooth. I've yet to leran how long the battery will really last, but after 2 days, it has clear sound and is certainly a value for the price. It does not sound very good in even a mild wind, however.