The sim is the best Radd's is fine if you want to waste your time with a fixed pitch that means more money and time wasted scooting around on the floor with a cheap fixed pitch heli that will add another couple hundred to the cost of your learning that could be used on a more productive heli while with a sim you will learn how to fly and trim out a heli.I looked at Radds and I even know the guy but it is for people that want to waste their time with a heli that has very little value for learning except to scoot on the floor fixed pitch are the hardest to fly and they are worthless except for flying in the house personally I like to fly outside.I spent 100 hours on the sim and went right into collective pitch flying and never wasted my money on a fixed pitch.I purchased a Trex and built it the very first time I tried flying pulled the heli into a hover and did it for a full battery pack.Also I guess a X wing heli is the XRB another waste of time it is a toy not a real heli it completely removes a very important part of learning the tail rotor and so what is going to teach you that???You want to waste time and money go that way or you can go with a sim and work hard and maybe go right into collective pitch if you feel that you are ready.I have been in it for eight months and because of the sim I have by passed fix pitch went right into collective pitch and own two heli's a Trex and a Voyager E and have no trouble with flying at all with out the help of Radd,I doubt that Radd's will do that for you.