I also have the X930BT and the hands-free works great. My mic is actually clipped to the front of the headliner right next to the rear view mirror. Everyone I talk to says it sounds like I'm just on my phone holding to my head. I have the mic pointed right at my mouth when I'm driving, and I'm sure that helps. I wanted the blue tooth for the many conference calls I have to take while I'm on the road, and I love it.
Kevin