This was a tour that I booked for my daughters 27th birthday that she was in Napa celebrating with my wife, two sister in laws and mother in law, yeah, a girls trip. :) I am the de facto travel agent for the family and I was requested to put together her trip to San Fran and Napa and she wanted to do a wine tour.
So I found the Napa Valley Open Air Wine Trolley Tour with Lunch, they met the trolley at the Oxbow Market, they visited three wineries, were able to walk the wineries, enjoyed a very nice lunch along with many glasses of wine (I was told that they had at least 15 glasses of wine,(damn lushes), learned about the intricacies of wine and Richard, the tour guide, did a great job with his stories and narration of the Napa and Yountville area. They meet some nice people who were on the trolley taking the tour with them and enjoyed their company.
Overall, the results were that they had a great time, my daughter was very pleases and the results were that they were thrilled with the tour. This tour is highly recommended by 5 ladies ranging from ages 27 to 85. :)