Good peruvian and nice people. Definitely top of the charts IMO for the Dulles area.
I'll give a report later, but its time for tonight's dinner. If you have been thinking about going, but didn't know if you should try... GO. I'm not saying it is an experience of all ages or something like that but the food is solidly in the "worth the trip" scale. Nice people too.
If you have no idea where it is, go to the countryside shopping center, look for the big (bad) mexican place, go down and to the left, there you will see the ABC store, right of that PEVs, and then in possibly the worst possible location in the world, El Estribo.