The tour was great. Intrepid Travels, the company who ran the tour was great. VIATOR, however, dropped the ball. The tour company did not have a reservation for us in their system. Fortunately, we did have a copy of our paid reservation confirmation and, although they were fully booked and could not accommodate us that evening, the tour company offered us a tour on a different night. We were very appreciative of their assistance as we could not find a phone number or email for customer service for VIATOR. I recommend booking directly with Intrepid Travels.
As for the actual tour, we had a great time. Our tour guide, Paul, was very knowledgeable and entertaining. We had tons of great photo opportunities and more than enough time at each stop to look around. The monuments are gorgeous by moonlight and not nearly as crowded as during the day. We highly recommend the experience.