I agree with this. I used D2h and xstream box, D2h has top notch quality for SD and HD channels, xstream has worst SD channels quality, i havn't check HD channels.
Earlier i thought, Because of Sony , am getting good PQ , but once i moved to Airtel xstream, then found it is problem with airtel, where all SD channels has worst PQ.
I saw tataplay in office samsung tv, that is far better than airtel xstream
Both xstream box and STB in airtel has same PQ.