I own X-Plane and MicroSoft FS9, neither one do a good job as far as modeling a model airplane. Neither one can match the real airplane as well. X-Plane is closer to how a real plane flies, but their slips are pretty sad in comparison to how it looks and feels in the real thing. If you wanted to capture the feeling of coming in too fast on final and floating down the runway, X-Plane is more realistic, you can almost feel the plane move on you. FS9 is more like a toy, but has better ATC and graphics IMO.

If you're wanting to model models, then this is not the sim to do so with, though it does work. I don't believe G2 is good for it either because to match up to my CAP 232 you have to do things that are not on the plane, i.e. larger control surfaces, more travel etc. Dion says AFP is pretty good on this point and I'll see soon enough because I bought it the other day based on his opinion and others, but I do know X-Plane, FS9, and G2 are not accurate for a model. For normal flight regimes, G2 will get you close, just not quite there.

For what it's worth, that's my personal opinion from flying model airplane, real airplanes, and flying the same in said simulators.