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This earpiece costs 1/5 of the others, while still offering a decent experience.
Pro USB charging
Instead of using a proprietary charger, there is enough room to include a fullsized regular micro-USB charging port on the earpiece. This means that there are plenty of affordable cables available if the original is too short or gets lost/damaged.
Pro Long battery life
Using just the one earpiece you can expect around 3.5 hours of battery life of continuous music playback. This time will be reduced slightly when making calls, however when compared to its competition it's a very decent result.
Pro On-headset controls
The rear plate is a physical button which can call the previous contact (double tap) or activate Siri (long tap) as well as a single volume button (5 levels - it cycles through from low to high and then back to low)
Pro Can be used as stereo earbuds
Included is an attachment that has a wire and an additional earbud. Plug the wire into the primary (larger) earbud, and you effectively have stereo bluetooth earbuds. It's your choice if you prefer to use the single earbud, or the pair (although the single earbud will provide longer battery life).
Pro Plenty of ear attachments
More than just different sized caps are included - you get two different styles of caps in multiple sizes. In addition, there are removable clear plastic clips that clip onto the earbuds to help keep them in your ear. These clips also come in different sizes, and are ideal when working out or moving around often when regular earbuds would have a hard time staying in your ear.
Con Unbalanced audio output
When the additional earpiece is plugged in for stereo audio, the primary (larger) earbud is always louder than the secondary.
Con Constant blinking light
There is a small LED which is constantly blinking whenever the headset is connected to your phone. This will draw others attention, making it more awkward to use in public (one of the main reasons for going with a headset that doesn't stick out of your ear).
While it doesn't stick out of your ear (much), the thick round disc at the rear of the earbud is sizable.