Best Bluetooth Headset I've ever used... and I've used several, especially those Motorola's. Motorola's are very stylish but to many problems. The 350 is excellent when it comes to sound quality, it's the most comfortable BTH I've ever worn. The ear piece is made of a silicone that fits directly into the ear canal, making for good comfort and call quality. The ear hook is soft and flexible so it to is very comfortable. This BTH was recommended to me by just about all of the Sprint reps I deal with and I would say they were right on the money.
The Only Con to this piece is the construction of it. It feels a bit cheaply put together, like I'm waiting for it to come apart. That could just be my piece of equipment tho. Here's a link to reviews and price ranges:
http://reviews.cnet.com/Plantronics_...-32041606.html