I've been dying to go to this since before it opened to the public. Finally got to go.
Well worth it! The site is cool with the old motel serving as the entry and 300 plus signs in the yard. While the tour didn't hit on all 300, I did ask about several that were not mentioned by the guide and she knew all about them. Impressive.
Enjoyable hour of a dive into the history of Vegas and the early marketing of roadside attractions!