This reply says, you have never used Tata Sky.
I have used both d2h and Tata Sky. Gave d2h DVR to d2h company for free where as still using Tata Sky DVR.
From service to UI everything is top notch in TS where as d2h hangs, lags and what not. While i was using it they used to add channels quickly atleast, now that too not happening.