I paid $3.19 for one.
The burrito was pretty big in size and wrapped fairly tightly; perhaps a little too tight as some of the contents spilled from a crack in the tortilla.
There was a good amount of ground beef to go around as well. The Tex-Mex spices made for a less flavorful version of Taco Bell's seasoned beef but with a slight spicy kick. There was a chunkier, more home-made consistency to the beef due to the larger chunks of burger patty. I have a slight suspicion that the beef might be sourced from daily leftovers in the same manner as Wendy's chili.
Given the seasoning and the fairly fresh tomatoes and onions, the Whopperrito feels a lot like a taco burrito (i.e. a burrito with taco-type fillings). It could do without the pickles though, as the mild sourness didn't quite work for me. Plus the lettuce and onions provided plenty of crunch.
Overall, the Whopperrito was just okay for me. While it works decently as a taco burrito, the general flavor lacked oomph. Additionally, while it re-purposed Whopper ingredients, it didn't really make me think of the Whopper while eating it (maybe I needed a hit of ketchup and mayo... I don't know). It's a filling burrito for a little over $3 though.
Nutritional Info - Burger King Whopperrito
Calories - 570 (from Fat - 230)
Fat - 26g (Saturated Fat - 11g)
Sodium - 1110mg
Carbs - 59g (Sugar - 7g)
Protein - 29g