Pros Nothing if you can not talk
Cons Receiving end can not hear.
Summary I tried with my HP iPAQ 3615. I can hear my incomming voice, but receving end could not hear my voice clearly. Its waste of money and time for me.
Pros AAA battery lasts forever,comfortable,several vol levels when folks have loud voices
Cons A little big, but it's ME OTHERS LOVE seeing it. No cons. I've tried the 'best' listed here on Cnet, NOT as good as this one.
Summary I took back 3 or 4 different models. This is the best. I use a Motorola V551 Cingular.
Driving is a breeze. I hit a botton say a name and it's dialed ! Though instant answer was a bit confusing to figure-out, the phone's fault though.
At home I can buzz around the room and not even feel the piece on my ear, walk too far away...about 20 feet, and realize I left the phone on a counter ! Great..I'm spoiled.
Pros The AAA is a really cool idea.
Cons Reliability of signal
Summary Poor reliability and connectivity with my Treo is spotty. That could be the Treo, but I'm more inclined to think it's a cheap headset.
Pros Comfortable, easy to use, comes with regular sized ear gels and mini gels, looks ok, reception can be good as long as nothing is blocking line of site to your phone (read cons too).
Cons Reception can be fuzzy at times, but I'm not sure if this is due to my phones reception or the reception between the earpiece and the cell phone. Like other people who use this type of product, you really do need to have the phone on the same side of you