In spite of the hype and the good services of the tour operator, the tour is not as fab as the reviews make it to be. McLaren is very quiet and the range of tasting was quite limited.
Port Victor is a nice quiet place but if we do not get the inside stories and the history, then better (and cheaper) to take the regular coach for a day there with access to the very same attractions such as granite island and the horse tram.
The lively bit came with the aspects of the murray river and the development of the area. I think the cockle train and its elements need to be integrated somehow to make the tour worth what you normally charge.
The local produce needs to be promoted more for the tour to be really 'regional'.