Pretty nice, even if I have no idea what they were saying. 
Yup, mic's are the best, the worst is when people film a video with a helmet mounted cam and try to film and talk. Viewing those video's are just ****.The rider uses a throat mic, that's why you can hear him perfectly even against the noise of the bike, even if using an open-face helmet.
Have a similar setup for my HAM rig, it's awesome -- you can near-whisper sitting next to an air hammer and still be heard clearly![]()