I honestly didn't expect much out of the sound, but was pleasantly surprised by the volume this little thing is capable of. In my very unscientific comparison, it was quite a bit louder than my Creative zen doohickey. As far as sound quality, a few of my mp3's sound a little bit tinny on the upper end. But in all fairness, I haven't listened to it through headphones yet. So it may still surprise me.
