There are several Mexican food chains in Longview; Jalapeño Tree, El Chico, and Papacitas to name a few. Posados is another one of those located in an area less traveled (at least by people looking for food). Most of the restaurants are on the loop.
Posados is one of the better chain restaurants. All of them are consistent with the quality of food.
My favorite go-to-dish is chili relleno. Posados has a pretty good one.
They are a little more pricey than jalapeño Tree but it is worth the price.