Before we get into how these things taste, let's start with how they smell; mostly, because the greasy "cheddar" aroma is going to hit you like a truckload of cheese wheels when you first open the Burger King bag. The smell is a powerful mixture of deep-fried food, hot and salty cheese, that inexplicable signature Burger King smell, and of course, Cheetos. It'll instantly transport you back to the roller rink of your pre-teen years -- minus all the falling on your ass and that weirdo who owns his own skates.
And yes, like many foods, the smell does much to inform you of the way Mac n' Cheetos taste. And by inform, we mean warn you. At first bite, they taste salty, cheesy, and deliciously processed like all fast food -- especially stunt fast food -- should be. In fact, they taste almost exactly how they look in the photos, although they're missing one key thing: the Cheetos flavor.
That's right: they hardly taste like actual Cheetos. Instead, they taste more like a Cheeto from which you've sucked all of the bright orange cheese dust and are left with a soggy puffed cornmeal nugget that -- in this case -- is also filled with creamy mac and cheese. This is not to say that they're not good, because they're actually dangerously good, but the classic Cheetos cheese dust flavor that you know and love is oddly either absent or just not strong enough. Basically, they taste like Cheetos as much as a Doritos Locos taco from Taco Bell tastes like a handful of Doritos... not much.
Your fingers will not turn orange.