Chiquito is a chain... it's basically a 'Mexican' version of Frankie and Benny's (which claims to be 'New York Italian', but actually originated in Manchester, England

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Chiquito is okay, but not authentic Mexican by any means... as long as you don't expect it to taste like real Mexican food, I don't think it's that bad.
Bear in mind, though, that I'm a UK citizen and did not grow up with Mexican food by any means - however, I did live in New Mexico for 18 months as a student, and I've spent over 2 years in the US in total, as well as a month in Central America, so I've eaten the real stuff as well and know how it's supposed to taste.