Do you have a Gas Strut servery window or Bi folds off the kitchen onto a deck? I would love to hear what you like about them and what you don't. Should I go for the bi folds which potentially we have the choice of having them opened halfway or all the way or Gas strut the only option we have is either fully closed or fully opened, no in between. At the moment I have a foot in both camps so your pros and cons for both systems would be greatly appreciated. Thank you, Karen