It's offered at $3.99 in my neighborhood.
While it's easily set up as a rival to McDonald's McRib, they don't even play in the same seasons; the McRib has typically been offered during the fall, whereas the Rib Sandwich has made its debut in the summer. If it's successful enough to bring back, it's possible that the two "rival" sandwiches will never go head to head. But on to the sandwich...
The butter pickles were thick-cut with good coverage (I got a bit in every bite). They're sweet and paired well with the barbecue sauce.
The bun is the same as you find on the Memphis BBQ Pulled Pork Sandwich as well as BK's chicken filet sandwiches. It's sturdy and dense, but soft and reminds me a little of brioche.
Nutritional Info - Burger King Rib Sandwich (205g)
Calories - 560 (from Fat - 280)
Fat - 31g (Saturated Fat - 9g)
Sodium - 1530mg
Carbs - 47g (Sugar - 19g)
Protein - 24g