When the entire country was paying loads of money for the Internet, Jio came as a savior to all of us. It really was good. But over a period of time, the 4G speed has not been unto the mark. And the signal quality in remote areas of India is still terrible. The plans are attractive anyways.
The customer service is very similar to what other competitors provide. They respond well only when you owe them something. if its their fault they do not respond at all.
Overall, Jio can always be your passive sim or secondary sim card for your internet. But it does not seem worthy enough to me to be my primary or main usage sim/cellular service.