We tried the 'vile and amazing' tacos that Jack in the Box sells millions of every year

Melia Robinson/Business Insider

Jack in the Box made headlines this week for its most popular item, a pair of tacos that costs just 99 cents. The fast-food chain, famous for its burgers, sells 554 million tacos a year - or about 1,055 units a minute - according to an investigation by The Wall Street Journal.

You might also be surprised to learn that these pockets of beef filling, cheese, lettuce, and salsa have been called "vile and amazing." One customer compared the taco to a "wet envelope of cat food." And yet, the customer told the Journal he's become addicted to the company's deep-fried hangover food.

We visited a Jack in the Box location in downtown San Francisco to try out he tacos. Here's what we thought.