Look, I'm not proud of how often I go to Filiberto's. Being in Arizona I should be eating at legit Mexican restaurants or something... But burritos aren't even a thing in Mexico, so I'll just treat this as an ambiguously ethnic treat.
I always get the veggie burrito. Delicious refried beans, rice, guacamole, lettuce, and onion. I soak it in the green sauce for a little extra flavor/heat. The red sauce they offer is "meh," so just skip that one and ask for double green. The burrito is only $5 something and huge.
Unfortunately, this particular location is extremely slow. Sometimes I wonder if Filiberto is the only one back there. Even so, the cashiers are always polite and friendly.
Side note: one time I got some chips with my meal and they were just out of the fryer. Yum!