Tour guide was definitely knowledgeable, but too long-winded and much of what he was saying wasn't directly relevant to the actual location we were seeing. The tour is listed at about 90 minutes, he told us right off it would probably be closer to 2 hours. After 1.5 hours, we had only stopped at 3 different sights, and he was still rambling on the third. It was hot, slow, and I was getting bored standing around for all that time. At this point we told the guide we were bumping out of the tour, and we went off and did our own thing. He seemed a bit annoyed.