allex
Google
Visited on a weekday (Thursday), practically no queue for entrance tickets, so it was great. They do recommend and provide guests with audio guides but we only took the map since there's a short queue to get the audio stuff.
The paper map/brochure gives small details about the specific areas, and there'd be signs for reading near the areas so you can be immersed in the history and culture.
Honestly, although a weekday, there were considerably more tourists(?) than I expected, but it was manageable to walk around without feeling crammed etc.
Just saying, the lift is tiny, so it's more of a leg activity when it comes to manoeuvring around. Plus, there's not alot of air conditioning, so prepare your own mini fan or cooling wipes if needed.
Its a really beautiful place, totally worth the money for the exploration of 5 floors + a bunker level.