I visited this WHS in June 2013. I drove here by car early in the morning - and a pleasant drive it was ... sunshine, a cool breeze, winding roads and then the castle itself. The 5 Euro parking ticket seemed to be rather excessive and a bit of a tourist trap (a bit like Kinderdijk's parking lot and other UNESCO parking lots). I was there early on purpose to avoid the crowds. The highlight of the castle's exterior was the different style and material used to build this peculiar castle. The tower offers interesting courtyard views (you have to pay 50cents to climb 2 flights of steps). The best views I enjoyed were those just before the castle entrance (next to the iron cannons). The interior of the castle was a pleasant surprise. The only way to visit is with a German speaking guide (considering that this is a very popular national heritage and a WHS, a little leaflet with the commentary in other languages should be offered to foreign tourists and should be that difficult to organise I suppose!). I understood most of what was being said anyway but there were others in my group who couldn't follow what was being said. Still, the visit is very interesting for what you get to see and my personal favourite was the Ladies' Chamber with beautiful mosaics and Martin Luther's Room for its historical value. Photography without flash is allowed inside.