Positives:1. Good battery life2. Very comfortable to wear for long periods3. Good mic, no one seems to have a problem hearing me even when driving in a noisy car.4. USB cable charger means I can charge anywhere I have my laptop, which is everywhere I go.Negatives:1. Even with the multiple size ear pieces I find that I still have to hold it to my hear to hear callers in a noisy environment.2. When it drops connection with the phone it does not automatically reconnect when it comes back in range, annoying.3. Delicate! Press too hard on the on/off/answer/disconnect button and you'll be asking for a replacement; same for the USB connector - be gentle. (Though it has survived several falls without incident).Overall, this technology still is not ready for primetime but this product performs adequately compared with the two other headsets I have tried.