Reviews can not be always good or always bad;sometimes they are mixed.That is perfect when we talk about Reliance JioFi.First of all, it is a very good initiative taken by jio to provide free call and data to its users.
But the cheapest is not always the best.You can get a jio device+3 months data( 1 GB/Day) by spending just 2500 rs. The service and speed of Reliance Jio is good but its not reliable.That means you can not say at which time you will get good speed.
If I am carrying a JioFi and I want to book a ticket in tatkal quota at 10:00 AM, then I will need a fast connection reliability.So, JioFi could have done better in terms of reliability.
However, service and support are quite good but if they improve prompt connection, that will decorate the chest of Reliance Jio. Good wishes.