Been using Vodafone for 7 years now, and it’s been great. All these years, never had any issues with billing and charges. Unlike some other leading mobile operators, it doesn’t pester you with new plans or worse, force them upon you. The only problem one may have is that of network coverage, especially if one is a frequent traveller to the rural parts of India, or other remote areas. In such locations, call drops can be frequent and so, wouldn’t recommend for the frequent adventurists. I’d definitely recommend it for the urban population using it only within the cities, especially in the metropolitan cities.