Having read the earlier reviews, i could not agree more. Although we had never been on a Segway, the owner and tour guide, Hunt, (yes, that is his name), was terrific. Initially, he spent time teaching us how to ride the Segway which was really very simple. The tour went to two wineries and a small (but, wonderful) cheese factory -- which we would never have discovered without Hunt and who personally served us with any samples we wanted, without any obligation to buy.
On the way to the wineries, Hunt would stop occasionally to take photos and give us some history of the area and the wines of Sonoma. At the second winery (Buena Vista which was recently renovated), Hunt gave a tour of unique wine tasting rooms in the cave and arranged for a fantastic picnic lunch.
Although the tour lasted over six hours and we traveled about ten miles, the day went quickly and was thoroughly enjoyable. While you have numerous choices in Sonoma, I would not want you to miss this unique and fun tour.