If you have or used the below addons what is your opinion and is it worth the purchase so give your opinion on the good/bad points. I already have "X Graphics" so if any would be a waste of money because I have X Graphics product please say so or would they all add to the experience?
# Zinertek - Ultimate Night Environment 2007
# Zinertek - World Environment 2007
# Pilots - FS Global 2008