Airtel has a mixed review. I used Airtel broadband for an year, and I felt cheated when I got an offer from a different operator who gave me a decent plan in 600. Airtel is very expensive, it has a good speed indeed but not in every area. I won’t say much bad about it because in my area it works really well(in my friend’s area it don’t) and the speed is good too. The only negative point it has is that it’s very expensive even in this time where there are so many competitors who are giving out decent plans in less cost. But if you are a good caller, then you can think of it’s Rs. 1200 plan, which gives unlimited calling with the plan.
I would suggest that first ask the operator to check and show you the speed before paying him, as one brand gives a good speed in some area and not in the other.