I have Tata sky from last 4 years in SD format.
Signal strength in tata sky DTH is perfect.
But its expensive compared to other DTH provider like Airtel, Videocon d2h, and sun tv etc.
Mansion a thing when you call the service and support team and you ask for the minimum monthly price of tata sky they said to you it is Rs.300 at the base channel, then after you have to say that, I am unsubscribing your DTH then they will offer you another pack that cot is only Rs. 199.Remember its a trick that I used to lower my cost, you can use it also. you dont lose too many channels.
Picture quality and sound quality is good not too bad it depends on your TV and Speakers.