I've always loved this place. Maybe it's because it's a block from my house, but probably because $5 gets you two delicious tacos. Also, they have a toppings bar with everything you could possibly want with an authentic mexican style taco.
Mainly take-out but they also have a few picnic tables you can sit and eat as well, though I've never taken them up on it.
Seriously though, if you're ever in beechview, this is the place to go.