Its neither a good nor bad mobile operator. I would more go with bad side because of various reasons like they used to charge unnecessarily on the behalf of silly excuses like "Sir you have used voice services or you have activated this service" and bla bla. Sometimes automatically activates caller tunes.
About network its fine but if we talk about its internet services its really poor. They have 3g & 4g networks but they works only like a 2g. I would suggest to go with other network like airtel.