We paired the Plantronics Voyager Pro with the Apple iPhone 3G. We tested this in a quiet environment, in a moving vehicle, on a crowded city sidewalk, and right in front of a fan to test the wind noise resistance. We were blown away by the sound quality of this headset in almost all environments. In the quietest environment, we came through loud and clear with a natural sounding voice. Inside a car and on a crowded street, the sound quality is still clear and crisp, with the slightest bit of echo and background hiss and a less natural sounding voice.
The real difference was when we tested the headset in front of the fan (at both low and high speed). Though callers could still hear the wind (they said it sounded a bit like crumpling paper), our voice still came through loud and clear. We tested this for ourselves by calling our voice mail, and indeed, this works. You might have to raise your voice a little to be heard better, but we just spoke in a normal tone and our callers could still hear every word. Indeed, it seems that Plantronics' Audio IQ2 and noise-cancellation technology really does work as advertised.
As for incoming call quality, that was very good as well. Our callers sounded loud and clear with hardly a trace of static or background noise.
The Plantronics Voyager Pro has typical features such as the capability to answer, reject, and end calls; call waiting support; last number redial; call mute; and it has multipoint, which means it can connect up to two devices at once. It has a rated talk time of 6 hours and a rated standby time of 5 days.