I agree with most of the other 3-star reviewers on this page. This castle tour is expensive and you…read moredon't see many rooms, nor do you get to ask any questions or interact with any human docents. You're given an audio tour and waved ahead.
We had fantastic weather when we were there, so no complaints there. And we were particularly careful to get there early, so as to not miss our entry time.
I do get it that over-tourism is a real issue in this region, and that this particular castle is a victim of its own success, needing to shuffle tens of thousands of tourists every season. But I'd like to think there are alternative ways of educating people about the castle and its builder, dreamer, and ruler.
TIP: Tour in the morning. By the time we were done and back downhill, the lines for the shuttle buses were easily 200+ people deep.
TIP: DO NOT EXPECT HELPFUL SIGNAGE! We had to ask multiple people where to pick up the shuttle bus.
TIP: If going straight to the castle, do not follow the shuttle bus crowds towards the bridge. Head the other way, and perhaps catch the bridge on the way back, especially if you feel like you might be rushed for your entry time.
TIP: BRING CASH. The shuttle bus is NOT included in your ticket price, and is cash only. It was maybe 2 euros pp (I don't honestly remember). You CAN walk it, but we had some health issues and needed the shuttle; the incline is significant and probably would take 30+ minutes uphill?
INTERESTING: this castle is about the same age as Biltmore in Asheville, NC. It's just not that old!