I received this product at no cost from the manufacturer in exchange for writing a review. I really like this. Here's why.
1. I own lots of electronic gizmos--iPhone 4S, iPad 3, Kindle paperwhite, Garmin 405 CX GPS watch, Jabra Play bluetooth receiver, etc.--so power banks have become a travel necessity for me. Typically I plug the power bank into an AC outlet so it is charging at the same time it is charging my gizmos. The problem is that most of my power banks have only 2 or 3 USB ports, so I need to bring multiple power banks. No more now that I have this product.
2. This has a whopping 5 USB ports. What's more, they cover the whole charging range--.5A, 1A (two), 1.3A, 2.1A. Yet this is a very slim and compact unit: 3 11/16" x 3 1/16" x 1 1/16". Plus it is attractive looking and has that "Apple look."
Note: A common misconception is that you cannot safely charge a device that requires only say .85 amp (like my Kindle Paperwhite) from a USB output with greater amps. You could use a 2.1 amp output to charge a Kindle if you wanted to; the Kindle would use only what it needs. Conversely, you could charge an iPad from the 1 amp output, but it would take a lot longer than from the 2.1 because an iPad needs more power to charge.
3. This charges with a micro USB cable. Included are 8" and 27" USB cables with adapter holes onto which you can put the included mini USB, micro USB, and Apple tips. A fourth "plug" tip is included for other kinds of gadgets.
4. There is a power button and four indicator lights to show you the status of the battery charge. I like that these four lights are each no bigger than the end of a thick paper clip, so in a darkened room they don't give off much light and also are easy to cover because they are spaced out only a total of 1/2 ".
Bottom line: This is a sleek and attractive way to charge lots of gadgets at once without the need for multiple battery packs. With its 12600mAh rating, I have no problem charging multiple products at once. However, in order to avoid draining this quickly, I keep it connected to an AC power source.
Update: August 21, 2013: With some battery packs the ports are always "hot", i.e. once you turn the battery pack on the power on the port stays on at all times, whether or not any item is in the port or is finished charging. So if, for example, you plug your iPhone in at night to charge, it's the same as plugging it into the wall via a USB AC charger.
Other battery packs, including this one, shut the power off to the port even if the battery pack is on if nothing is being charged, or if an item is done being charged. This serves to conserve the power of the battery pack. So if, for example, you plug your iPhone in at night to charge, the USB port will no longer be "hot" (i.e. provide power) once your phone is fully charged.
In addition, just plugging an item into the port will not start it charging. To make the port "hot" you have to press the power button on this pack, even if (as I do) you leave the pack on all the time and have it plugged into an AC USB plug.
I discovered this the first time that I plugged my Kindle Paperwhite in to charge, and came back a couple of hours later only to discover that no charging had occurred even though the battery pack was powered on. Lesson learned.