I've had Sky HD for about a year. I really loved it until recently, when it seems that nearly all the HD channels have suffered a drop in picture quality. I've noticed it massively on BBC HD, FX HD, the football on SKY SPORTS HD and all the film channels. Apparently, this is going to get worse as more channels get added, sharing the same bandwidth.
I'm dissapointed, so i'm toying with the idea of going back to SKY+ and putting the tenner i'll save every month towards re-joining Love film, now that they are doing Blu-Ray.
EDIT - I watched 'Jonathon Ross' last night on BBC HD. It looked like a good standard def picture, not HD at all. BBC HD used to be amazing, with a picture so sharp and vivid that it had an almost 3D quality. Shame what's happening. I've just worked out that Im paying £744 a year to sky! Sod that, that's ridiculous for TV. I'm getting rid of HD soon as, going back to Freeview and watching the footy down the boozer!