Consider that rival McDonald's removed their smaller and less meaty double cheeseburger from their Extra Value Menu, in lieu of the McDouble (same sandwich but with only one slice of cheese instead of two), due, in part, to cost concerns, and BK franchisees may have some valid grievances.
As for flavor, nothing overpowered the main feature which was the meat and cheese. There was a nice bit of char flavor to my patties which I love. The cheese wasn't completely melted but that's more aesthetics. If you like meat and cheese and little else, this burger is an excellent value at
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Calories - 460 (from Fat - 243)
Fat - 27g (Saturated Fat - 13g)
Sodium - 990mg
Carbs - 28g (Sugar - 6g)
Protein - 27g