I've just come from eating there (on a busy Saturday night) and it was one of the best meals that I've had in a long time. I am very fussy (see some of my other reviews) but I don't understand the negative comments from other posters about the food (although restaurants can be inconsistent or change chefs, etc). Absolutely everybody in our large party was delighted with their food--my entree of soft shell crabs was the best I can remember. The menu is huge and there are many specials--from fish to pasta to chicken to lamb it was all outstanding.
The service was stellar--but they were efficient and a little brusque so I understand some of the less than favorable comments below.
But they did everything we asked--we were a party of 10 and there were picky eaters and people with allergies and on and on. And they were not patronizing and they accommodated absolutely all the requests without saying a thing or appearing to be put out or charging extra--including dividing dishes without being asked when people wanted to share. They just didn't fawn over us--so if that's what you need maybe this is not your place.
And not only did they not try to push more expensive options on us, they suggested several times that a dish was plenty for two people. And in fact the portions are very large.
The only reason I don't give it 5 stars is that it is fairly expensive; even the pasta dishes were in the high $20's. And they don't tell you the price of any of the many specials that they rattle off when you sit down (although if you ask they do tell you of course).
It's not anywhere near where I live; I chose it because friends were in Tysons for an award dinner. But I will try to find a reason to go out to Vienna again. This is definitely a keeper.