Wow this place is amazing! It's funny because I just learned about Atlas Obscura where this is also featured, but got a hot tip from a local at a pinball tournament at Flipperspiel last night to check this out since it was Nevada Days and all.
So many crazy things to explore here and there's no way you'll see everything on a single trip. Things you might see. Arnold Schwarzenegger in a brothel, Liberace's piano, Darth Vader figure cases lining a staircase, the original 1966 Batmobile, a chair that you can sit in that Buzz Aldrin sat in and a TON more!
Feel lucky that I was in town and heard about this place since it's definitely nothing like anything else you may have explored!