The New York Times has a review of Brazil here. Slashdot's review is here. Roger Ebert reviews it here. These are not specifically reviews of this shorter version.
The Criterion Contraption's review says,
In Brazil, Terry Gilliam asks the audience to imagine a world where the government wages a never-ending war with shadowy terrorists, a world where civil liberties are being destroyed in the name of security, a world where torture becomes official state policy in order to conduct more efficient interrogations of suspected terrorists. What's more, in Gilliam's fictional world, the central government is not just secretive but incompetent. Mistakes are made, leading to the imprisonment and torture of innocents.
Despite the description, Brazil is not a documentary.
Senses of Cinema has a page on director Terry Gilliam.