I needed something fairly lightweight, but with decent sound quality and the ability to link to my iTouch & iPad. The In Motion Air fits the bill. I paired it up with my i devices and it's working great. Sound quality is not on a par with bigger systems, but is enough for me when listening in the kitchen, bathroom or in my garage. I haven't used the bluetooth dongle supplied to link it to my computer, so I can't comment on that, as that's not what I bought the unit for.
The best part is the built-in rechargeable battery, making this truly portable and carried room to room as I please.Sound carries well for such a small unit, but lacks a bit of bass - again it's a portable unit and still adequate - just don't expect bass levels equivalent to a 2.1 speaker system.
Overall, I'd highly recommend this if you want true portability and wireless connection to bluetooth enabled devices.