I generally avoid Filiberto's unless I've run out of other options, and even then I stick to one or two things on the menu. They can't mess up a basic breakfast burrito with eggs, potatoes and cheese. Well, I say that and the potatoes are always undercooked so they're crunchy from the rawness. They make a decent AZ burrito, but it's greasy as all get out--you'll want to pour out the grease before consuming the last bit of the burrito.
Because it's so close to the house, I've been here at least 30 times, so I have a fully-formed opinion. I used to be excited about them when they first opened--who wouldn't be excited about 24-hour Mexican right on your corner? Over the years I've become turned-off by their cheap meats, overly greasy food, and inability to cook potatoes.
A better option for a cheap burrito in the area would be Los Favoritos in Chandler or Some Burros.