We used Salvatore in Naples (Pompeii and Amalfi coast) and I can't say enough good about the experience. We also had a wonderful view in a restaurant in Ravello with great food and great prices. We loved the private service and the fact on those narrow step roads I can't imagine being in a tour bus. In addition, if anyone gets car sick definitely do the private tour because you have a little more control and can see where you are going. Salvatore's address is [email protected] I can't remember the price but he coordinates if others join and we had four others and the cost was less than 100 euros a piece.