The reasons are simple, he made very many things, and does it well:
1- recharge smartphones or tablets (6000 mAh)
2- serves as AP (Access Point): you plug a ethernet network and created a wireless network
3- serves repeater / bridge or Wifi hotspot
4 lets you share the contents of a USB key
5- finally allows to share the contents of an SD card
Wow you say, but all that for which applications? Here's what I found him personally so far:
* Able to exchange files with USB keys and iPhone / iPad (in one way or another, the iPad to the USB stick or USB key to the iPad - same with iPhone)
* Same with key SD
* The hotel, create a WiFi network for his family (you pay only one connection and several people are covered)
* Seminar or training, be able to provide the contents of a Wifi key to several people (just connect to the interface, it's that simple, and it works with a PC, MAC, tablet , smartphone, etc ...)
* Expand its WiFi network at home (to surf on the terrace and not worry about the limits of its Wifi)
* To create a network for guests and not having to disclose their key your network but only the key FileHub
* Etc ...
Finally, its capacity exceeds my expectations, I used it several times for 5 h as a bridge or Access Point, and it holds very well hit with multiple devices that connect to it.
So, if I had to paragraph 6 stars, I will award without hesitation. A MUST HAVE, I recommend it to any IT geek, or just anyone wanting to perform one or more operations that I mention here.