I've lived in the Phoenix area for eight years and have eaten at dozens of different Mexican places looking for the best food. Rosita's Place has consistently come out on top. Their refried beans are the best I've ever eaten. Let me say that again: their refried beans are the best I've ever eaten. I like their carne asada burrito and their green chili is also good.
The building looks a little worn from the outside, but inside it's very clean and the service is always good. I wish they had other locations because it's a long drive from where I live in Chandler.