I have had two different units. The first one was only "fair" at best as I had to crank up the volume to hear my callers but that led to a lot of wind noise and echo. Eventually I dropped it and ran it over with the car, a fitting end I think. I decided to buy a second one just to see if the first was a fluke unit. The second one worked much better right out of the box and was crystal clear and loud enough. However, after 3 months of use the sound quality has degraded to almost inaudible. I have contacted Scala for a "free" replacement unit. If the don't want to send me one, thats ok, I will take my buisness elsewhere.