Clear crisp sound, even when cranked up loud, make this a great little speaker for listening to podcasts. However, when listening to music I found the sound to be very tinny when used with my iPod. Even when saving songs with extra bass on my Mac, and also setting my iPod to extra bass, the lows were still lacking. I'm not talking about heavy metal or rap either - I listen mostly to alternative rock with a mix of classic rock and the occasional ballad. While everything had a clear sound without distortion, even when cranked up, the quality of the sound was still comparable to using an old fashioned transistor radio on an AM station. Very disappointing.
BTW, the comments about the size are spot on, this speaker is only about half the height of an iphone, which make it small enough to throw in a purse, laptop case, or backpack. The thickness of it makes it too big to stuff into your pocket though.