These days, you'll find many Bluetooth speakerphone makers extolling the hands-free virtues of their in-car devices. Certainly, the $89 SuperTooth HD Voice allowed me to navigate calls using my voice, as opposed to constantly fumbling for controls by feel alone or----egads----taking my eyes off the road to pinpoint a button's precise location.
The HD Voice is a cinch to snap on and off the sun visor. You slide a clip on to the visor, and the HD Voice attaches firmly to the clip, thanks to the magnetic buttons.
Using my voice, I could pick up calls when they came in by saying "Answer"----sometimes just a grunt would do----after the HD Voice announced the caller from my address book. However, I wasn't able to give calls the heave-ho. Despite numerous attempts, the HD Voice didn't listen when I said "Reject" and sent the calls through. (Drat.) I still needed to hit the HD Voice's rotary button to end calls and spin it to adjust volume. The HD Voice compensates with the super-sized double-duty volume/call button which is easy to find by feel alone, in a way where the BlueAnt Commute's controls were not.
As far as call quality goes, overall, callers said my voice had a slightly higher-pitched sound to it, across the board, and my rambling had a subtle metallic or robotic tinge constantly. Some of the time, I sounded far away. All that said, people concluded that they could still understand what I was saying nonetheless. The HD Voice shoved freeway noise and music from my car stereo into the background admirably. Audio quality on the receiving end----that would be my end----proved to be steady to boot; callers' voices sounded pretty clear, if a bit speakerphone-ish.