Summary: Combined with the iPhone app, the Sound ID 510 is a truly excellent Bluetooth headset for iPhone owners.
Pros: The Sound ID 510 is a slim and lightweight headset with a discreet, minimalist design. It comes with different-size ear loops that feel comfortable in the ear, and we like the dedicated power toggle. The Sound ID 510 has a dedicated iPhone app that adds features like Personal Sound mode, a headset locator, Environmental mode, and more. It offers great audio quality as well.
Cons: Special features like the Personal Sound mode and the headset locator are available only with the iPhone app; Android and BlackBerry owners will have to wait for their own apps, whereas nonsmartphone users might never have these features at all. We also prefer physical volume controls to the touch sensor.
Excerpt: The Sound ID 510 Bluetooth headset looks amazingly sleek, slim and most importantly, it's ultra comfortable. Not only does the 510 fit perfectly in your ear, it also sounds very good on both ends of the call. The 510 has RealComfort EarLoops which I noticed right away how comfortable they are compared to all the other headsets I've come across.