When it came, my first impression, as I took it out of the box, was that it seemed big, but that's mostly because of its configuration being mostly behind the ear.  I've been pleased with this device as it's extremely comfortable to use for extended periods of time and seems very secure on my head. Performance-wise, it's got very good sounding audio, both directions. This is my second Plantronics Bluetooth headset and I've also got a wired Plantronics earbud for my Blackberry. It seems to be a brand I can trust to give me consistently good results. Highly recommended.