Ive been using relaince JioFi from past six months now and this is my experience.
The internet speed is preety good but only in some areas if you take this hotspot with you while travelling you will get only blue light in it which means low speed data Thus, now relaiable connection.
After using it for half a year the major problem which I faced was that its battery started draining very fast. so I went to service centre and told them about my issue but instead of solving it they told me to keep using it while plugging in to charger!
This was there SUPPORT!
Overall an average device.