The guide was very knowledgeable and professional. The driver did a great job of not jostling us around too much. The 10 minute stop was much appreciated, and the sites and information were enjoyable and interesting. My only complaints were 1) It was absolutely freezing with a very cold wind, and the flaps were never put down, nor was the heater left on. The last 15 minutes were especially cold. 2) The tour was about 15-20 minutes too long. 60-70 minutes is plenty of time to see everything.