JIOFI is a mifi device, you can easily use it without any problems
DATA-, it keeps your data safe and secured, its network setting can be changed at jiofi.local.html . even if you forget its password just push the wps button and you are on the network, it have strong internet connection, if you want to share internet with your family then its a good device, but lacks very long distance coverage.
LOOK - its sleek and small easily fits in your pocket its design is futuristic and gives you a gadet feeling
USE- if you use a laptop and need a good hotspot without using your smartphone then its a best option, it dont takes much time to start just hold the power button and you are on the go, if you are not willing to purchase a 4g smartphone as you already have a decent 3g phone then its best of what you can buy now .