My wife and I love Sweetgreen so much that we will find excuses to drive from North Carolina to eat it over a weekend. Everything I've had on the menu is 100% delicious. You can also eat as cleanly as you wish at this restaurant which I really appreciate, as I currently live somewhere that is a borderline nutrition desert. You really can't go wrong with this place (any of the locations).
Working for a few days in DC, I found this spot and returned daily for lunch. Excellent fresh veggies with plenty of options for a 'heartier' or lighter style of salad. As a Brit who finds salads in the U.S. to be heavy on the dressing, I found it refreshing to be asked how much dressing I wanted. Deservedly busy at lunch time. Worth queuing for.
Custom made salads. Choose your ingredients and type of dressing and they make it right in front of you. You can get crazy or just choose one of their recommendations. They even let you choose the amount of dressing so if you like just a bit or like it dripping you'll be happy. The bread is fantastic rustic crusty wholewheat. The salad is huge but we managed to eat the whole thing anyway.