Our party of two was one Hesse fan and one non-fan. There was a movie dubbed in English and I think it was like 45 minutes long - that seemed a bit excessive. There were a lot of great photos and some nice memorabilia from his life, but mostly everything was in German. The fan said the movie and displays were "not a comprehensive look at his life", so take that. We did do the walk, which was quite nice, but a bit hilly and not entirely shaded, so definitely bring water. We ate at the grotto stop.