My partner and I purchased a Groupon for Su Vino, we each could sample 5 wines of our choice and share an appetizer for $16 + tax. I overheard one of the waiters say that almost all of their customers come through Groupon, so it seems like the Groupon is always available. So if you'd like to go, make sure to get one a day ahead of time!
We made reservations, although, that was total overkill, there was almost no one there on the Friday night we went. The staff was very nice and the cheese platter we selected was huge. More than enough to substitute for our dinner, and we're big eaters.
The only problem was the wine. Personally, I found it completely unenjoyable. Everything was just so sweet! Even after I asked our server for the driest wine they had I received a juice-like white wine.
Loved the people, food and price but I just cannot recommend this place as a winery.