I have been using Airtel broadband for about 4 months now and I must say that Airtel is a company to trust on. I have opted for the 16mbps plans and apart from one or two times in the entire duration I have never received an issue regarding the speed. The connectivity is literally 365x24x7 and this makes it even more favourable option. More over the customer support is extraordinary and you can call anytime and your issue is fixed in a matter of minutes.
I would like to rate airtel as an ISP in my area(Indore, Madhya pradesh) as:
SPEED: 10/10
CONNECTIVITY: 9.5/10
CUSTOMER SUPPORT:10/10
RATE PLAN:10/10