The first time that I went to Vallarta's, I got a lunch special and I was very impressed. The food was pretty good and the price was cheap. So, we went back another time for dinner - with the kids. I didn't think it was as good. The dinner prices were way too high for the quality of food that you get. In addition, their kid's menu was ridiculous. It was $6 for a child's quesadilla. Let me clarify, this is not a fancy place. It's not like you are paying for the atmosphere.
In summary, I think it would be a good place to go for lunch on a lunch break and get the lunch special. I really wouldn't recommend it for dinner though because you could get much better food for the price that you will be paying.