We had a terrific trip. If I could rate just our guide, Gonzalo, I would give him 10 stars. His tweaks to our planned itinerary, his breadth of knowledge on geography, geology, flora, fauna, history and politics, and more much enhanced our experience. He graciously indulged our idiosyncrasies. And he calmly and efficiently dealt with all the headaches of travel. The overall rating of four stars reflects more logistical glitches than expected on a top tier tour. As a couple of examples, the agency we were referred to for air travel really screwed up and one airport transfer was not there when we arrived (although our flight was very, very late). The itinerary management app we were provided was not accurate enough to count on.