The Mini Jambox is a slimmer, sharper version of the original. Gone is the rubber that capped the top and bottom; the new device is cool metal all the way around. In terms of first impressions, it might seem slightly less friendly than the first Jambox, but it proves no less touchable. Jawbone has modified the audio to a level of quality unheard of in mobile devices. And, once you get your hands on it, it exudes superior quality–not unlike the difference between the iPhone 3GS and the iPhone 4 that followed it.