At first I will start with network coverage as a beginner Reliance Jio has performed really well. The connectivity of the phone network is superb as I have experienced it myself. They have offered a lot of goodies for us which expresses that the company really values its customers.
Customer service is very impressive. Before and after completion of daily data the company informs everyone through sms.
Till March 2017 all the services are free and it means a lot for everyone.