Overall, great experience! It's less counter service and actually a sit down. Went on a Friday afternoon, so wasn't too busy. Got a bunch of stuff, and definitely would come back!
On to the detailed food review:
Brisket: very good flavor, especially the crust; pretty tender, especially when you order the fatty part (which isn't overly fatty); also the ends are great.
Turkey: awesome light alternative to the other heavy meats, and goes excellently with the mustard BBQ sauce that Mabel's has on the tables
Pork Ribs: probably the best thing they sell; extremely tender, fall off the bone, and wonderful flavor
Spicy and Cheese Kilbasa: really good as well; a bit of a kick
Greens: bacon and kale are good together, though nothing to write home about
Potatoes: awesome; wonderfully fried but without overwhelming the potato inside
Beets: strong horseradish taste; would not order again
Chocolate Pudding: the toffee popcorn and cream on top makes this dessert; pudding itself is pretty good
The bread was rye I believe, and two slices come with your order but you can ask for more. Diet Coke is plentiful and free refills.