Accessories

excellent bluetooth headset
Pro:
1. Very clear; I opened all of the car windows while driving on the freeway, I can still hear clearly through the headset. The person who was talking to me can also hear me very well.
2. Long battery life; So far I've only charged it once when I first received it couple of weeks ago. But perhaps it's also because I don't use it very often (only on the road), and I'd turned it off when I'm at home or office.

Con:
Well, not sure if it counts as a con, the button for turning on/off the headset is on the top, and it's pretty difficult to press (plus there's not much of a "bounce" when one presses it) especially if it's already on your ear. But I guess most people probably don't need to turn on and off the headset very often. The button for picking up calls is very easy to press though, so that's a plus.

Overall I like this headset very much as it performs very well, and it's comfortable to wear (although a little difficult to put it on at first).

Excellent
This blue tooth device is really good. I purchased it based on reviews at Amazon and as always I am satisfied with the product. The one I got earlier had a connection break problem at random times but Amazon replaced that one and now it is working great !!!

Works but not as well as I'd hoped
This is the first Bluetooth device I've had. I got it due to the recent legislation in CA requiring handsfree devices to talk on the phone while driving.

I find it clunky to wear and am told, often, by the people I'm speaking with the the sound quality is not very good.

Setup was easy, battery life is so so and I would recommend a friend try something else.

Great Bluetooth
The Plantronics Voyager 510 Bluetooth is comfortable to wear and provides excellent quality communication. The styling makes this product less obvious than most other bluetooth devices. Volume controls are easily acessible. Range is good. I can walk to the next room, or fill my car with gas without getting out of range. Battery life is exceptional. This product has met all of my expectations and needs.

Perfect if you have two phones
I have a Jabra headset for my work PDA/phone, and it works very well. But, with the new CA law regarding phone use in the car, I needed one which could switch between two phones. This does just that and it does it remarkably well.
Although you cannot switch while in a conversation very easily (you have to hold the call button until it beeps twice to release the call to the phone mic/speaker and then could pick up the call, but have no easy way to switch back), it handles the obvious uses well. If one phone starts ringing, the headset correctly selects it so you can pick up the call - perfect.
The headset is comfortable for very long calls, with a good balance on the ear.
The microphone stalk is not as movable as the product brief suggests, and it does not fold up per se (sticks out no matter where positioned). Folding up the mic does not power off, which is a shame, although the battery life seems really good.
Sound quality is good on the speaker and appears to be good on the other end, although I have not heard the other side to know for sure.
Only downside vs. the Jabra is that it does not have a USB charger (small cord to plug into laptop when traveling), so you have to drag along the transformer.