Definitely as a airtel subscriber I would not say it is not worth but I have experienced mixture of quality.
When first bought, it gave really good picture quality on tv and also had multiple offers on recharges. However, they fail to provide similar quality during monsoon. Even light rain would turn off the picture or would give a scrabbling quality. Very Irritating if you are watching something favorite show.
The service from call center is however good and available numerous languages for all Indians but they are helpless during bad weather.
The good part is they send low balance message so we dont need to remember when to recharge next or we could simply recharge for a day, week, month or a year. They also have different shows for children on exceptional channels but need to purchase them.
Overall the picture quality is good and good services and options for all age group.