I purchased a couple of these for me and my wife.  We both love them.  She likes it because it's easy to clip anywhere while she's excercising and I like it because of the audio quality.  It's like I got a brand new pair of headphones!  I'm using the same in-ear Sony headphones I had before and the bass response is so much deeper and the trebles are crystal clear.  One other thing is the built in battery, it charges via the usb cable.  We can use the car charger we have for our cell phones (Motorola V3) to charge the mp3 player.