The instruction booklet on the cub is easy to follow and the plans are very precise. The plane is (easy enough for a beginner to build) but not easy for a beginner to make that first initial takeoff successful without an instructor once it's built and ready to go for the maiden flight. That plane has a tendency to go left or right real quick on take off and without some experience your reactions will probably be too slow to compensate for a nice takeoff and end up damaging it one way or another.

For every action there is a reaction. And for beginners with that cub it's usually the Wrong reaction!