Margaritas - 5 star, the best house margarita I've ever had. $7
Chips and salsa - my mouth is watering right now for the dark smoky almost paste-like salsa. I wish I knew how they got this flavor - much roasting? Paprika? The chips were clearly fresh and housemade but somehow thicker than usual chips. Unusual and delicious. $3?
Enchiladas - very good, a bit heavy on the cheese/sour cream/grease but with good taste. Not hot spicy but very flavorful. Served with a small side of black beans. Veggie (onion, pepper) - $10.
Service - meh. Server couldn't keep the simple drink orders straight. I got black beans instead of pinto. Didn't bring check for over an hour without checking whether we needed anything else. Didn't split check or ask for clearly a party of separates.
Atmosphere - nice typical Mexican though well done. Very loud. Hot (though to be fair it was over 95 outside) and stuffy.
Website says open til 9 on weeknights and at least a couple tables came in and ordered after 8:30, eating at 9. Private room upstairs may be available for large parties? Small so I'd guess there would be a wait (no reservations for parties under 6) on weekends. Note that while this place is 2-3 miles north of Sewickley it is on a residential street a block off Route 65 from the Leetsdale Industrial Park sign on the Ohio River.
Other fillings sounded unusual (to be tried next time because there will be many next times): a pulled chicken with chipotle and a pork with pineapple. The fillings are listed as options at the bottom of the menu but not described anywhere that I saw so ask your server. May be upgraded to 5 stars after trying more entrees.