I use Flight Simulator 2004. FSX is to expensive and my pc isn't one of the fastest on the world to play FSX. I'm still happy with FS2004, because he works fine. Also there aren't not many FREEWARE Add-ons for Flight Simulator X. For FS2004 there millions off downloads of scenery, airports and aircrafts. There are also more PAYWARE for FS2004 and not for FSX. The only thing I like in Flight Simulator X is the new graphics and the controltower-option.