The PlugBug charger acts as an US travel adapter for your MacBook Pro/Air MacSafe Power Adapter and on top of that it gives you an additional USB port that allows you to charge your iPhone or iPad. I find it super useful for hotels that has limited power sockets. If you prefer not to attached it to your MacSafe Power Adapter, no worries as it can be used as a standalone USB charger.
The USB output produces a 5V at 2.1A which is perfect for iPad charging.
An international version is in the works right now and should be available by early next year and I am so going to get that as well!