Some reviews are easy: the thing either works or it don't. iGO everwhereMAX works, so if you like the idea of it and are fine with the high price, here's your green light.
This device is a generic laptop power brick that auto-senses the device's power needs and comes with an y-adapter that lets it rejuice cellphones and other gadgets at the same time. A car and airplane adapter is also included. Tips are available for "most major brands," including Dell, Apple, Sony, HP, Nintendo, Motorola, Nokia, Palm and Samsung (the compatibility list is at igo.com), and plenty of one-offs (Peek!). Generic USB power is there, of course, but it looks like it doesn't supply overcurrent: there's no tip for the original Moto Q, one example of a USB-charged device that needs more than 5V. There isn't a tip for my OQO, either.
Optional accessories such as an international prong adapter and a compatible NiMH battery charger are also offered.
In the flesh, the brick is compact (About 5 inches long by 3 wide, and an inch deep). The secondary "dualpower" adapter (to hook up multiple gadgets to the brick) is surprisingly bulky. A carrying case is included, and a selection of tips for most laptops.
At $130 for the brick and dualpower adapter, then $10 for each extra tip beyond the basic laptop set, it's expensive. You could easily spend a couple of hundred bucks to get it working with all your gadgets: if all you need is a replacement brick for your laptop, it's a waste of money.
If you buy it, buy it for versatility and space-saving problems you already have.
One thing that would have made it special: a couple of standard mains outlets on it, so it could perform extra duty as a power strip.