We were looking for a good way to tour a bunch of Sonoma wineries in one day and ran across the Wine Trolley. We thought it might be a bit hokey, but it turned out to be great way to sample a range of offerings around the town. We toured four wineries in and around Sonoma, including a couple of larger more well known brands and a couple of smaller more esoteric ones. The whole tour took most of the day (10:30 a.m. to 4:00 p.m.), and included a pretty good lunch.
The trolley was reasonably comfortable, and the driver was friendly and knowledgable. The group on the trolley was not so large as to be unwieldy, and the staff at each winery was ready for us. The tour was also quite educational, including some history of the town of Sonoma and the wine industry surrounding it, and a truly informative tour of the vineyards at one winery.