After long research (Thanks to Mouthshut.com), I decided to buy BIG TV. Today morning at 11a.m. I went to RK Electronics at Ameerpet (Hyderabad) and purchased the set top box. The sales man told me to call BIG TV customer care and raise a installation request.
After reaching home, I called BIG TV customer care and requested for installation. They took my details and gave work order number for installation. After looking at the reviews in Mouthshut.com, I expected that I may get call from their installation team after few days. Surprisingly I got a call within 5 minutes after raising the installation request.
The installation team took the land marks of my house and told me that they will come in another half an hour to install the dish. They came at 1p.m. and completed installation by 3 p.m.
It took only 4 hours from purchase to install. This is lightening fast response that I never expected from BIG TV installation team.
I will post my experience with BIG TV after few days.