Rositas is not fully authentic but far above the likes of Azteca and such.
If Im in the area I love to eat here primarily for their splendid homemade tortilla bar.
The have a person constantly making fresh tortillas at the bar and you simply tip her or him and partake as you like. There is nothing like fresh corn tortillas!
The food IS pretty good but still not authentic mexican. It is always full and always fun.
Rositas also has a full bar.