I would highly recommend this trip. The bus is a small bus (although enough room to sit comfortably) so you are only in a small group. We went to three wineries, with plenty of tastings included. We also had lunch. Not only was the wine great, the tour of the winery was great and our driver was very knowledgeable. A very relaxing day. Definitely worth it. A couple of recommendations - if you would like to visit a particular winery, make sure you tell the driver at the beginning of the tour (our driver did not ask, but said later in the day that if we had mentioned the winery we wanted to visit, he could have accommodated us). It was no real problem though because the wineries we went to were excellent. Also phone the company on the day before to check the pick up time from your hotel - our documents said 10am but they picked us up at 9:15am (luckily I had phoned the day before). I would definitely take this tour again next time I visit. In fact, I may book it twice!
We had a great day touring several wineries. Lunch was fantastic. Our tour guide, Seth, was very knowledgible and accomidating. This option of a small group with all fees and lunch paid for is the only way to go.
We had a ball. Our guide, Frank, was wonderful and very accommodating.