The sound was inferior--tinny to a degree that was downright irritating. It seemed cheaply built with flimsy materials, and it's silly not to include an adapter cable for using other brands of MP3 players. These cables are very inexpensive and would eliminate the need for another, separate order; I didn't notice that it wasn't included. Fortunately, my son had extra cable and the iLuv worked fine with my Creative Zen Nano. The sound was just too lousy, though, and I returned the product. Amazon refunded my purchase immediately. In my experience, their customer service is terrific.