It depends on what you mean by "accurately enough". To teach a student the interplay between pitch and power, how changes in configuration require changes to pi

It depends on what you mean by "accurately enough". To teach a student the interplay between pitch and power, how changes in configuration require changes to pitch and power, etc, they can be useful. They are very good as instrument procedural trainers. For flight at high angle of attack, e.g. slow flight near or beyond stall, the models are not very accurate. Also a simulator will never help a student overcome the fear they will invariably feel when they do their first power-on stall.