I am having my conservatory roof changed from polycarb to glass and am now faced with the decision on which glass to have out of Pilkington active or Pilkington active sunshade does anyone out there have an opinion? I want to use it all year round, it is in a south facing garden and from what I can make out the sunshade would be the best on a really hot summers day but not on sunny autumn and winters days, help anyone please