If you are like me and don't like the types of earpieces that fit inside your ear, this is the earpiece for you.  While it does take a little time to fit and adjust onto your ear, once you do, it is very secure and comfortable as it sits over your ear.  I especially like the easy way it turns on and off (opening it or closing it) and the easy to feel controls.  It works well with my iPhone and the USB style charing cable means I can easily plug it into my usb car charger anytime I need to.  the sound is clear enough and people can hear me just fine although people have noted that it sounds a little "stilted" at times.  THis must be hte noise reduction kicking in as this seems to be the most pronounced when I have the window open.  I like it alot, but having said all this, if you a) do not like the feel of something resting on your ear, or like having any kind of bulk or weight on your ear (it is very light, but it is noticeable) then this is not the earpiece for you.  Otherwise I highly recommend this model.