I have been working a contract in center Charlotte for a couple months now and don't often pack a lunch. There are a lot of options in center city, however about one to three times a week I eat here.
Not only are they the tastiest of all of the burrito assembly line joints. They are consistently clean, which matters a lot to me. I have yet to see random meat chunks fallen into beans or cheese all up in the quac.
Also, the habanero salsa is awesome.