I bought one for $2.85.
Beyond a distinct buttery quality, Chick-fil-A's buttermilk biscuit is pillowy soft, dense, and a little crumbly with a lightly crust to it.
The cheese was thoroughly melted and I lost little bit of it to the wrapper.
Overall, Chick-fil-A's Sausage, Egg, and Cheese Biscuit was really nice all around. Besides the texture of the egg, I wouldn't change a thing.
Nutritional Info - Chick-fil-A Sausage, Egg, and Cheese Biscuit
Calories - 670 (from Fat - 400)
Fat - 44g (Saturated Fat - 19g)
Sodium - 1470mg
Carbs - 44g (Sugar - 5g)
Protein - 23g