Summary: bought two of these over time. excellent noise cancellation and pairing, voice recognition and quality sound. the engineering is prone to fail. the connections to the charger fail, on both pair I bought, and then wont take a charge.
Summary: The battery life is very bad. It does not hold charge for too long. It is sleek and has cool functions but does not last long at all. I bought two of this headsets and gave one as gift. The recepient has the same complaint and is not happy. I wil not recommend it.
Summary: I received my Stone 2 last August. At 1st it worked alright. Sometimes audio was garbled. That may be due to signal. Not long after when putting it in the charging base, it would not terminate it's connection with my cell phone & had to b e turned off manally.