I've been flight simming since I got SubLogic 1.0 on my IBM PC jr, then I got Mircosoft Flight sim 1.0, then ATP, then every MS Flight sim since then...Also the P3D versions 3-current, and X-plane, which I dont use much... I was getting tired of the memory limitations of FSX and the CTD's all the time. Even P3D v5 is slowing down with all the scenery and other addons I have, so it was nice to see MSFS run so well without the performance hit. Its still not up to par yet as far as complexity but as 3rd party publishers release items its getting better.