Fuzzy's is a great place for young people, walking around Mill. The restaurant is nothing fancy. Its decorated/painted in very bright colors, TVs hang along the walls and there's a HUGE booth in the back corner.
The food is cheap and clearly, they are known for their tacos. The frozen mango margarita I ordered was big and delicious.
With the restaurant so close in location to the ASU Football & Basketball Stadiums, they offer Game-Day Specials and a signature Sun Devil marg. If you're in the area, I would check it out.