We booked this excursion through Viator. I would not do this again as Viator makes contacting them for questions etc. very difficult and adds a go between which was not necessary. Also, I booked 5 tours and the only 2 with issues were those booked with Viator.
Our guide was Sugar. He is very knowledgable and knows the area (particularly Nice). He was a little late at in our pick up and told us that due to traffic that Cannes and Antibes would not be possible. In hindsight, even if traffic permitted this, these additions would have greatly limited our ability to enjoy Nice, Eze, Monaco and Monte Carlo. Sugar made sure to take us to the best picture spots and did not hesitate to stop anywhere and everywhere this was necessary. He also had a great day planned for us with a great view of the area from a cemetery. He also took photos of our group and was genuinely invested in our have a good experience. He recommended places to grab snacks and took us to the Flower Market in Nice, which was phenomenal.
I would strongly recommend him and this excursion. It was not at the same level as the tours I booked with other companies due to the change in itinerary, the van being a Citroen versus the Mercedes we had in other locations. But be prepared, for his being very assertive about staying on schedule and paying attention to his points in locations. Again, his intent is for you to see as much as possible.
My only other suggestions, spend as much time at Eze as possible and ask for a bit more time in Nice. These were highlights. Especially Eze.