I installled tata sky recently at my place as I had purchased an smart slim hd samsung tv.
Hence I needed high defination service for my tv. Most of the channels are available with tata sky with decent quality of picture but the charge you pay is extremely high.i pay 550 for the service for just 22 days.
Which when you compare with cable service is almost double.plus they increase the charge every now and then. Second problem is during rainy season. The service goes off as soon as it rains.you will surely miss something important during rainy season which is not the case with cable service.
Third problem is you have to find place to fit the dish which is big in size.overall a below average service I wouldn't recommend.