Road noise and the AC vent mounting is apparent.

The biggest problem is calling people on the phone because of the road noise.

The mic works well even in my vehicle which has a lot of road noise, though much of the mic quality can depend upon where you mount the device - ideally placed within your general speaking direction

the sound quality on both ends is superb, no road noise or background noise at all

At first I thought the broadcast was too quiet, but then realized I just needed to turn up the volume on the device as well as on my stereo (duh)

I had to get a 90 degree adapter to make my installation neater as with the straight jack the cord is in the way of other items, the 90 degree plug was needed to keep the cord away from tangling with cup holder use