This little ugly-ish set is still ruling the market with great sound quality for both its owners and people they talk to.  I have owned or tested several supposedly great Bluetooth sets with several different phones and devices including iPhone 3G, Motorola Razr and L6, Blackberry 7100i, two different laptops (Skype) and Playstation 3, and no other headset performed as well as Plantronics Voyager 510.