Once we were in the van, the trip was enjoyable from start to finish. Melissa, our tour guide, was friendly, informative, with a little humor thrown in - couldn't have asked for better service. The ride was pleasant. Seeing the long horn sheep was a treat. The Dam sights were amazing. The biggest drawback was the pick-up. We stayed at Caesars, and the pick-up was at Bellagio, and that was quite difficult for us, as it was a very long walk. The Viator staff, I cannot say enough nice things about them. I overslept the morning of our original tour, and they were gracious enough to contact me and let me reschedule. That was just top-notch in my opinion.