I love the RealFlight Sim. The closest thing to flying when you can't get out. If you are a heli flyer, the upgrade from RF G5.5 to RF G6 is worth it. However, for airplane and quad flyers, there's really not much that is new for us. The graphics on 5.5 and 6 look identical on a high end system. The planes are about the same except for a cool Sbach. About the only thing that is new that I use is the rewing feature and I rarely use that.