I would rate Sky's coverage a 7/10.
The amount of detail they put in was way more significant then BBC ever did (they actually had a half hour build up for both sessions) however they need to understand the pacing a little better, cutting away for interviews whilst on track action is under way is a bad idea, however I did like the work Ted Kravitz did.
As for adverts, you did know right that you can switch to on board shots of the drivers whilst the adverts were on, during 1 advert break onboard I saw Kobayashi, Schumacher and Maldonado all do some off roading
Well the commentary team was Crofty and Davidson so you got the usual enthusiasm and bias's.
As for the on track action, I don't think Red Bull are where they want to be at the moment, the car looked a little nervous in both sessions compared to the 3 Mercedes teams that looked glued to the road. (Though the commentary team seemed fit to ignore this completly and pretend to think Red Bull is the best car out there blindly ignoring what was happening in front of them) The McLaren looks immense.
Ferrari looked like a pig of a car to drive, for Alonso to do as well as he has on the times I think is more a reflection of his quality rather then the cars.
Whilst at the back of the field I was rather impressed by Marussia considering the lack of testing they have, Pic seemed to have some difficulty getting his car up to speed but otherwise had no problems and (even if it is clearly fuel corrected!) Glock was trying to overtake Vettel at one point and with 20 minutes to go in the session sat as high as 3rd! HRT look in bad shape (again) with Karthikeyan breaking down in both sessions, de la Rosa not running in the first session at all only to find his nose cone did not fit the car so they had to file it until it did, then the power steering didn't work. The laps Karthikeyan did manage were a long way off the pace.