The first time we were in Napa, I had our hotel book a town car for us. They used Magnum. We didn't know what we wanted to see, but the driver took us to some great places. He talked with us about what we liked, then made some great choices. When we went back for our next visit, I pulled out my old credit card statements becuase I wanted to be sure we used the same company. I worked with Jim via email and he set up some tastings at smaller wineries we would never had otherwise seen. On the second visit we booked the Bentley -- Totally worth it.