Delicious and filling meal for under $5? Not too many other options. It does seem that they burritos have gotten a little slimmer over the years, but they are still huge and filling. You can hover over the burrito maker and tell him exactly what you want (black beans? extra hot sauce? a little grilled onion? they'll pretty much do whatever you ask). The place gets very crowded, but at peak times when they've got both lines going, things move pretty quickly (though sometimes it's hard to find a seat). Across the street from Porter Square T stop, or risk the health of your car and park in the big parking lot (or try the smaller Galleria parking lot).