Dario was very knowledgeable, accommodating and a pleasure to engage with in conversation!! Most impressively, he handled our group of 9 people (age 75 yrs all the way down to age 9 years old) seamlessly. He navigated our young children, teenagers and grandfather with perfect timing for lunch and breaks as needed on a very hot day. Highly, highly recommend. He is the reason why private tour guides are worth every penny.