Jio is to be the gamechanger of the recent times. It has directly or indirectly benefited the customers by means of free data and lowering of data pack prices by other service providers.
Talking specific about Jio, yes the 4g speed is quite good. It has helped in ensuring a standard speed in India.
But the problem is with the signal strength and reliability. Since it is a new player and quickly increasing its network presence there has been many instances for me where even though there is signal shown in the phone it becomes unable to connect the internet.