This is a great little device. The noise canellation seems to work better than that of the built-in bluetooth feature on my husband's car. With the car's built-in speaker, I have been told that they can hear the noise of the engine, air conditioner, etc, but I have not had the same complaints with this.I also like the full duplex feature, which is not available on most bluetooth speakers in this price range. The small downside to this is that sometimes, the person on the other end of the line will get an echo of their own voice. BlueAnt tech support (they were quite responsive, btw) suggested that I adjust the volume of the speaker. I had to play with it to find the right balance so that I could hear the other person without them hearing an echo. (Warning: this can be difficult with certain people who might not have the patience to wait!) However, once I found the right volume, it worked fine.