Chili cheese burritos are the best. Some locations have them, some don't. Of the two closest locations to me, one has them all the time, one doesn't. Dunno why. I used to think it was a regional thing but these two are only like five miles apart so who knows.
I did notice that chili cheese burritos and enchiritos are currently on their new/limited time menu so you may be in luck right now if you're really jonesing for one.
As I sit here and think about it now, I kinda wonder if it's because neither one of them uses lettuce so it was a quick and easy way to get something "new" on the menu that wouldn't require an apology for missing ingredients.
They don't fall apart until some fool of a Took comes along and touches them. Then you're boned.