I have been eating at on the border restaurants over the past 20 years -- mostly in Texas but also this one in Tyson's corner for 10 years or so. We went for lunch here today and were very disappointed. Food was BLAND, service was pretty poor and margaritas aweful. We jad the skinny margaritas and they had a fake sweet flavor that dominated. Must be some artificial sweet era added to the lime juice. What is the point of that? If you order a skinny margarita, you expect less sweet and more lime flavor, not fake sweet. The food was so bland-- how can nachoes with fajita steak taste bland? Somehow they managed...our fighter was happy to play on the tablet, and the guy who made gresh tortillas in the back was great with my daughter and made her an oversized one which she loved.
There are much better tex mex places to eat in the DC area-- Guapos, Austin grill and Lauriel plaza. Even cactus cantina is better.
On the border used to be good standard tex- mex fare, but has clearly sunk to mediocrity.