I give a four stars on the performance and a five stars on the price.I have the headset for about a month. The headset works very well with my Cingular Black Berry 7100g. Installation was very simple which took me less than a minute. The voice quality is relatively good with very little static noise once awhile. Although I have not verified the 7 hours talk time, but the batter seems last for a long time. I wish the speaker could be louder which is essential when I use it outside the car or office. However, for what I paid for it, the headset is a star.