For me, while FAR is a bit harder than stock, it is also much much much much MUCH more fun. Things actually do what they're supposed to, you can make realistic rockets, you can do an actual gravity turn, you can make lifting bodies, you can make space shuttles with reasonable glideslopes, you can re-create all sorts of aircraft, and much more. Just look at how fun it is: Planes are still reasonably easy to build at low tech levels. This plane was able to fly to a survey point around 150km away and at an altitude of 16,000m: Missiles also actually make sense: Shuttles are really fun and look realistic: Crazy stuff is still possible too: If I ever saw Ferram in real life, I would thank him a ton and buy him a cup of coffee. The fancy little aerodynamic info graph things of science were also difficult to understand at first, but after finding out what all the lines meant it became a huge time saver in building planes. The in-flight gui also helps a lot with aircraft control and information.