Perfect for a group that didn't have much time in San Fran. Our tour guide was great and even drove us by some famous tourist spots on the way out of the city. However, the 2 wineries we visited were smaller in size so if your looking to see larger vineyards, I would recommend going for a full day.
Our tour guide, Paul, was fantastic! We didn't know we would hear so much history! Super nice and kind and just really great!
The two wineries that we went to were very good, the hosts were very friendly. Our tour guide/driver was very informative, the experience was very nice.