Quiznos has great sandwiches- lots of variety on the menu, really fresh ingredients, and I love that they toast them. It's a perfect spot for a quick lunch or take out. This is a nice spot for a very casual dinner too, because the work crowd is gone and it's generally pretty empty. However, stay away from the soup. I had some terrible chicken noodle soup at this location, and it's very expensive for the amount you get.
This Quiznos is about a block from the Farragut North metro station.