I picked one up for $4.99.
The Maple Bacon Dijon option includes maple bacon, grilled onions, Dijon sauce, white cheddar, and lettuce. You also get to choose either a Quarter Pounder patty, Artisan Grilled Chicken, or Buttermilk Crispy Chicken as well as either a sesame seed, potato, or artisan bun. I went with the beef patty and potato bun.
The maple bacon was lightly touched with a syrup-y sweetness. It sported some crispy edges here and there to go with an enjoyable smoky flavor. The tangy Dijon sauce goes well with the sweet and smoky notes.
The onions added an extra sweetness and a slight watery crispness, while the lettuce was pretty fresh. The cheese was your basic super mild and creamy stuff but was nicely melted.
Overall, McDonald's Maple Bacon Dijon Burger made for a quality and novel bacon cheeseburger with just the right balance between its savory and sweet components.