reference books. It has very few illustrations, but has many more Nevada chips than "The Official Guide". Even that doesn't have everything. I've also run across chips from the Horseshoe that aren't in either book. However, many collectors choose to own both, and if you're serious about downtown Las Vegas chips I think both should be in your bookcase.
Frankly, I thought the movie was so bad I couldn't watch it all, and I also missed the very beginning. If there were some shots of Las Vegas I missed them, but there were lots of supposedly outside downtown shots that were obviously indoor sets.