I've been introduced to their kale offerings and must admit, I'm a huge fan. There's a kale salad that you can ask them to put in a wrap and it's absolutely phenomenal. Almost all of their veg options are fantastic.
The downside of QS is their Sunday brunch. I know, I know most brunches are breakfast foods only, and this place is no exception. On a personal level, I don't really care for breakfast food for lunch and since you have no other choices, it's not my thing.
Like I said though, this place is fantastic for veg food, so give it a try.