Thanks to its secure dock-cradle design, sturdy handle, internal power supply, and "bigger" sound, the iThunder is ideally suited for carrying around like a traditional boombox. And, despite a lack of treble detail, it sounds quite good. However, at $200 with few features, it has some heavy competition from other "transportable" iPod speaker systems, such as Altec Lansing's superior (and, at current street prices, less expensive) inMotion iM7; you'll want to shop around for a discounted price.
(See our full review via the link below. Also, note that although our review states a price of $200, the iThunder is now $150; the price change occurred just as we published our review.)--Dan Frakes