O que se diz lá fora acerca de 21:
«Greed is good and comes without a hint of conscience in 21, a feature-length bore about some smarty-pants who take Vegas for a ride.»
Manohla Dargis, New York Times.
«Loosely adapted from Ben Mezrich's best-selling Bringing Down the House, the movie stretches facts like taffy but never shirks its responsibility to entertain.»
Peter Travers, Rolling Stone.
«While I'm firm believer in the adage 'Never let the truth get in the way of a good story,' 21 doesn't spin a good enough yarn to justify all the changes.»
James Berardinelli, ReelViews.
«21 is built around some standard-issue plot mechanics, but it's still a clever and novel card-sharp thriller.»
Owen Gleiberman, Entertainment Weekly.
«If you think the OCEAN'S ELEVEN series would have been better with a cast of hot young no-names -- playing MIT students! -- and with roughly 38.7 percent the coherence and wit of Steven Soderbergh's films, then this one is for you.»
Andrew O'Hehir, Salon.com.