I see sky are offering sky+ to existing subscribers for £149 + £60 installation. What kind of installing does it require?? Or have I just read it wrong and don't have to pay for installation? Also, any other comments regarding picture quality and overall pro's and con's would be gratefully appreciated cause the wife is on at me to upgrade before offer ends on 5th September. I personally dont see why we need to upgrade. I need to be convinced first. Is it any good?