A Cub is nothing more than a nice looking trainer. If the model is overweight, balanced incorrectly, or with the controls not set up correctly, then you will have a difficult plane to fly. Otherwise they should be able to practically fly themselves if you don't interfere too often. We're talking about the kind of plane that you can set to circle the field while you make a sandwich or "take a wiz" .
If your model is a little bit too heavy, it will take more experience to fly. Any high winged plane with a lifting airfoil will fly [and land] like a dream if built light enough.