I actually ate here a while ago, but the experience was so bad that I have been putting off writing about it for a long time. Vinifera is located inside a Westin hotel near Reston. I decided to head out there for some wine and tapas before picking my husband up at the airport, and it ended up being a huge mistake.
I sat out on the patio, which was totally gorgeous, but it took 20 minutes before I could flag down a waiter to take my order. I put in an order for a whole bunch of tapas at once, and also some wine. The wine arrived pretty quickly, but the food didn't even start arriving until 40 minutes later. 40 minutes!!! And then it was only the little one bite skewers; the rest of the food took even longer. That is totally unacceptable. And the food wasn't even that good. Less than average, I would say, and I tried a whole range of things. I won't even break down for you what I ordered, because it was all so forgettable. The $1-2 "pintxos" seemed like a great bargain, but they are literally tiny toothpick bites like you would find passed around at a party. Tiny, not that good, not worth $1-2 each, and definitely not worth a 40 minute wait. The rest of the food (and wine) was also overpriced.
I would maybe, MAYBE, say that it would be a nice place to grab a glass of wine on the patio, but not if you are on any kind of a timeline and watch out for a steeper than average mark-up.