I've been here a few times since moving to Pittsburgh last fall. Totally a dive bar and I love how unpretentious it is.
The first time I had gone we were greeted by the bartender/owner? but then were apologized to for not having any pierogis. I guess they had ran out during a happy hour. Waitress came by and before she took our order said BBT was sorry that they no longer had pierogis but made some other recs. We were bummed about the pierogis but each ordered the kielbasa sandwich. And man o man the kielbasa arrived (though it took a while) and wow it was fantastic. Little crispy on the outside and some good flavor with the sauerkraut and mustard. On our way out, the bartender/owner again apologized for not having pierogis though told us to come back and I sure made a note to. You definitely feel at home being in place like BBT.
I came back a second and third time to bring some out of towners and BBT did not disappoint again though this time they did not run out of pierogis. Red plate special along with some beer. I haven't had any thing but polish food at BBT though do not plan on deviating from it. The nights they have bands play are fun too.