If you're serious about Neon Museum especially at night, Book Online!!! It's simple and you won't be disappointed if they're sold out.
If you're mature and have lots of respect for people and Las Vegas history, this 1 hour guided tour is for you. You can learn from the guide as well as from your group. But if you just want to look at signs go to downtown and enjoy the well lit signs over there for free.
I learned so much from our tour guide Wendy today. She's a Las Vegas historian. Lots of information are from back in the days. But if you're open minded and have visited other museums, it's worth the trip. I won't share some of the history about Las Vegas because it won't be the same as hearing it while you visit the Neon museum.
This museum is well organized and very clean. If you bring a back pack you have to check them in so bring your body and a single lens camera like an iPhone. No recording as well. I wouldn't recommend kids under 12 either. It may be boring. If you're super rich feel free to donate like $200,000 so they can restore some of the Neon signs.
I do want to return to experience a night tour next time.