Don't get me wrong, Viansa is not bad and being the first winery you encounter on the way to Sonoma (from some directions) it is a good first stop on the way. The view is spectacular, the grounds are a lot of fun, and the deli is useful. To my mind they make too many wines and should concentrate on the ones they do well, and they try a little too hard in general. The experience is a little empty. The same goes for all the items in their deli (though the abundant free sampling does present an opportunity for the hungry spendthrift). So although everything fits together nicely, overall I do not think it is up to the standard of greatness, wine culture, and scenic beauty that marks the best spots in Napa and Sonoma.
Pros: Fun, Convenient, On site deli
Cons: Too commercial, A litle hollow, Wine is only fair