I am from Ujjain a city of Madhya Pradesh. I was earlier with BSNL and ported my number to Vodafone. I found the service of the operator better in comparison to BSNL. I have selected postpaid 375 plan and getting very good stuff out of Rs. 375 pm. It is giving unlimited data with 3G up to 1GB. 500 local and STD calls. 100 Local and national sms. Yes I have to pay for roaming as roaming is additional voucher for Rs. 72 pm.
3G data of the operator is not available everywhere in our area but coverage in Mumbai is very good. Speed is reasonably well not super fast.
Call quality is very good but call drop problem I faced sometimes.
Signal/Network coverage though is very good but I personally feel low signals at number of times and places.
In the junk of 7-8 operators in the city, I find this as suitable for my needs and budget.