The central "gimmick" of the comedy-adventure Twins is established early on. Unbeknownst to one another, king-sized Arnold Schwarzenegger and gnomeish Danny De Vito are twin brothers. Even better: Schwarzenegger is a mild-mannered, bookish type, while De Vito is a vitriolic troublemaker. The film takes satiric jabs at the notion of "perfect" genetics, and makes several pointed comments concerning the dangers of youthful pre-conditioning by insensitive parents.

~ Hal Erickson, All Movie Guide