Why buy this from us and not someone else?  Well, we are the creators of X-Plane.  And, we always have the latest version that is available on DVD since we are the ones that update X-Plane and have the disks created.  Also, our disks have the GLOBAL (whole world) version and will work on both MAC and Windows.X-Plane 10 Global is the world's most comprehensive and powerful flight simulator for personal computers, and it offers the most realistic flight model available.X-Plane is not a game, but an engineering tool that can be used to predict the flying qualities of fixed- and rotary-wing aircraft with incredible accuracy.Because X-Plane predicts the performance and handling of almost any aircraft, it is a great tool for pilots to keep up their currency in a simulator that flies like the real plane, for engineers to predict how a new airplane will fly, and for aviation enthusiasts to explore the world of aircraft flight dynamics.X-Plane contains subsonic and supersonic flight dynamics, allowing users to predict the flight characteristics of the slowest aircraft or the fastest. X-Plane also includes more than 30 aircraft in the default installation, spanning the aviation industry and its history. Aircraft included range from the Bell 206 JetRanger and Cessna 172 to the Space Shuttle and the B-2 Bomber. Additionally, more than 1,400 additional aircraft models can be downloaded from the Internet (X-Plane.org, the X-Plane.com Links page, and Google are good places to start looking), many of which are completely free. If those aren't enough, users can design their own airplanes and test-fly them!The full X-Plane scenery package covers the Earth in stunning resolution from 74 north to 60 south latitude.  The regional version of X-Plane only covers a portion of the world.  This is the GLOBAL EDITION of X-Plane that covers the whole world.