If you're looking for hard core Mexican, I've heard good feedback on that place on 331 in Freeport, and Destin Taquerita, and there are also a couple other places in FWB that have sprung up to follow the immigrant construction workers. (There's a place in Mary Esther advertising beef tongue tacos and goat tacos for one)
We gave Cantina Laredo a try a couple weeks back, and we enjoyed it. They actually made me like my side of roast vegetables, the salsa was good, and almost everything was well-prepared for what it was. My complaint was that the chicken, though still edible had crossed the line to a little bit overcooked. Overall it was good, but for us, La Paz is more in line with our tastes and preferred price point.