I'm a purest. I like beans and cheese in a burrito. I know it's basic but if a restaurant says they are "authentic" that is where I'll start.
The beans have a slightly odd flavor by themselves but with salsa, cheese or both; Christina's nails the flavor. I would go back just for that taste. I added pulled chicken which a lite tomato flavor. The chicken was lean and complimented my bean and cheese burrito. The salsa has a kick and it is a classic style. Very good.
I think Christine's nails quality and quantity for price.
Is it better then Los favoritos ? ( I'm sure I'll get a few frowns) I think in the basics they are both good. Los flavoritos is probably more in quantity but I'm sure Christina's kicks ass in its other specialties.