Four words: Blackened Chicken And Caper. This place is the best for burritos in Boston period. Now while its true that we do not have a huge Mexican population and are far away from Mexico for $6 bucks, you have a huge, fresh Mexican sandwich.
I was in San Diego, which is a bit closer to Mexico than Boston, and I thought Viva Burrito was as good if not better than the more seasoned competition
Please Note: I am not responsible for the inevitable gastric distress from the Blackened Chicken and Caper Burrito. It is, however, worth it