I needed a sound system that is portable and doesn't require external power source. And BassJump was best fit for my needs. I was very skeptical but I am now very impressed. The difference of the sound with it and without is night and day. Although this will not replace the traditional 2.1ch desktop speakers, this will make the sounds coming out from MBP or MB reasonable. I think most people will be satisfied it. http://twelvesouth.com/products/bassjump/ P.S - It's $59 at Apple store.