The only problem with experts is many are very good at flying and set up, but can be lacking in experience or ability to teach new pilots. It is easy to forget the challenges new pilots face and the new skills that are just being learned. For an expert, trainers can be frustrating to fly due to the A/C constantly trying to re-establish straight and level flight. This trait is what makes them ideal for learning, but can hinder advancement when the student is ready to move on to more advanced flying. When you find you are trying to fly the A/C beyond its capabilities, and feel the need to modify it, you should probably move on to an advanced trainer or an easy sport plane.