Brtibrat hit it on the head. After experiencing the sims for my self I have also come to those conclusions. Take what you can from them and dont expect perfection you will be disappointed. Remember one important thing you will never have a plane to fly like one on the sim for the simple reason that you will never set your plane up to the exact specs that RF has theirs set up at. Sure the numbers and figures may be right on with your p-40 or p51- if you try to take em from the sim and transpose them to your aircraft. But computers dont read info on wing span hp readings and control surface deflection as we do. A computers language is completely different. Whos to say that the computer is simulating those exact inputs the way a real plane would. I guess experimenting in real life would be the only way maybe they have but in my experience with RF they havent. Planes are way to easy to fly in any weather. And either much easier to land or the exact oposite much harder than they should be. Take a look at the perameters of those downloaded planes form RF they are so unrealistic to make them fly the way they should at the field and even then its a disapoitment. If you have a specific purpose for using the sim other than say actual landing air to ground transition and what it would really feel like. I would say yes its a blessing. People getting used to rudder and how it affects their plane. which way to correct when the plane is comming at you. Those things can save you hundreds of $$ at the field. But their is no substitute for the real thing. I use AFP for practicing 3D even though it is so close to the real thing in its phsysics theres a defiante difference at the field but it is eaisly transferable IMO.