I have been a airtel user for 3 years now.
They offer a variety of packages and HD channels are worth the money.
One tip: never go for second connection from airtel, you will face a lot of problems with channels.( 1 is enough)
But I had some issuses with airtel.You see I love watching English movies, one day some channels got cut off my view.
I called the operator and one fellow came and fixed it.
Prior I had the cartoons too, now they were not coming but english channels were.So I feel still they are not 100%, and I am not fully satisfied customer.
The signal strength is good, during rains you cant get signals.