I purchased this unit primarily to take advantage of the MP3 player function in my new LG Shine Phone.As some of the other raters have mentioned, the fit behind the ears is a bit snug, but it is not as painful as some have described. It sits well on the neck and does not catch on my collar or when I lie down in my hammock. The one aspect that I find challenging is knowing when the unit is fully turned off to avoid draining the battery.It has very clear sound, in fact I hear much more to the recordings than I do playing them through the computer speakers.