Ever since graduating last year, I insist on going here almost every time I go up to Champaign! The only entree I've ever had here has been the brisket sandwich, and it is phenomenal! If you show up early, try to order the "burnt ends" if they are available, those must be the best thing on the menu from what I've heard. The sweet potato fries are delicious, as are the smoked chicken wings!
If you can't decide which sauce to have (my favorite is the Texas BBQ sauce, which has beef drippings and ancho peppers as the base. They should seriously consider bottling+ selling their sauces, because they are all amazing), you can order a "flight of sauces"-- a sampler of all their available homemade BBQ sauces for $3.
This place almost always has a line and not the most abundant seating, so it's best to show up during "off hours". e.g. before 11:30 and after 1:30.