We booked this trip based on reviews here, and you guys were right - this was a fantastic choice and the highlight of our two-week trip to Italy. We booked a private day tour of the Almafi coast with PrivateDayTours. Our driver picked us up at our hotel in Sorrento in a Mercedes van, and we toured Positano, Raffelo, and Amalfi. The views were simply stunning, and trust me, you do not want to drive these roads - in many places only one car could get by at a time. Ralph, our driver asked us where we wanted to go for lunch -- he suggested either a quick sandwich, or a full lunch. We opted for the full lunch - and he took us to a resturant overlooking the bay nearly 1,000 feet above the Med. We walked in through the gardens where tomatoes and herbs were growing to an amazing resturant overlooking the most incredible views. The food was great, the wine was good, and we were introduced to "Mama", the owner and chef. Ralph gave us time to tour the towns, and arranged for a convenient pickup point - there is no parking available in these towns, and the locals who work there have to park sometimes a mile or two away. He kept up a running commentary on the trip, and pointed out landmarks and places at every turn.
Bottom line - loved the trip, we were taken great care of, and the tour was excellent. Highly reccomended!