The entire experience was terrific. I took the 3.5 hour tour and was glad I did. In this tour you not only see "the basics" (which are great but are views you can mostly see on line or from the the main building) but also go into the "back country". There you see ancient hieroglyphics, caves and wild horses. But, depending on your guide, can experience Navajo drum and vocal music but also personal stories from the Navajo guides. I cannot speak regarding all the guides, but our, Don Mose, is a gem. He is a native Navajo who has had many unique and fascinating experiences not just in Monument Valley (MV) but, literally, around the world. As someone who grew up in MV, he imparts his unique experiences to your journey and his, and his family's personal stories. Don fully interacts with everyone in your tour and, especially, with children. In the course of the tour he provides interactive activities and stories as well as moving of his own and Navajo history. . Do a tour with Don and it will positively impact your life and anyone with you.
And, just by the way, my tour group would not let me participate as a single person, but made me pay as a couple.