As I am using airtel digital tv from about 2 years the biggest issue and the reason behind not recommending this product is because of its picture quality for e.g if the engineer setup your signal at 80 after about 2 or 3 days you may find the signal strength of 70 and because of which there is a huge impact on the picture quality.
The second reason is the package the package price gets hike on every 3 months which is a very bad news for a normal user.