Vodafone network is best all over india. But Data plan charges are 35% more then the tata docomo data plans. Call rates as usual like other operater but maximum plans for 28 days so they have to provide minimum 3 months plans.
One best thing free local minutes you will get if you recharge with special offers which are differ from no to no by dialling* 121#
They also send sms when you reach 90% of your data and when data limit exceed instead of other operater like tata docomo.