Philadelphia Inquirer by Steven Rea

A spirited, smart-alecky look at the ongoing conflict between a government that wants to eliminate pot and a public that wants to smoke it.

Salon

A flashy, smoker-friendly documentary on the twisted history of the evil weed -- and the misguided drug war against marijuana.

Los Angeles Times by Kenneth Turan

This turns out to be an informative, involving, even sobering advocacy film.

Salon by Jeff Stark

A flashy, smoker-friendly documentary on the twisted history of the evil weed -- and the misguided drug war against marijuana.

Film.com by John Hartl

Grass is often closer to the sobering tone of the PBS show than it is to the silly "Weed," with its stoned, barely literate potheads discussing the quality of their dope.

Christian Science Monitor by David Sterritt

A revealing, often amusing, sometimes disturbing look at the history and politics of marijuana use in American society.

Entertainment Weekly by Lisa Schwarzbaum

This jovial tour through changing attitudes toward cannibis is so plugged into pothead logic that the opening credits are rerun at the end.

Chicago Reader by Jonathan Rosenbaum

It's as entertaining and informative as anything Mann's ever done, and as good an example of grass humor as you're likely to find anywhere.

TV Guide Magazine by Ken Fox

He's (Mann) a solid historian and this film is full of fascinating facts, but he's a cultural critic at heart, and a good one at that.

The New York Times by A.O. Scott

With its pointed narrative, the film makes its case with a minimum of pushiness and a subtle nod to its crowd.

L.A. Weekly by David Chute

Aims for crowd-pleasing impact over subtlety. But it's still a welcome corrective to the current "zero tolerance" fad.

Austin Chronicle by Marjorie Baumgarten

Until something better comes along, we're just gonna have to keep the fires burning on this Ron Mann Joint.

Seattle Post-Intelligencer by Sean Axmaker

Charged with raucous energy and a satirical slant, this witty history lesson is preaching to the converted, sharing a knowing wink with everyone who's ever inhaled.

Village Voice by J. Hoberman

Grass's relentless hard sell ultimately grows wearisome. Although only 80 minutes, it ends, and not a moment too soon, with a pot legalization rally that might well be reproduced outside the theater.

San Francisco Chronicle by Edward Guthmann

Rich with statistics and snazzy visuals, but it ignores those larger questions and, as a result, feels a tad naïve.

Washington Post by Michael O'Sullivan

It has as much of an ax to grind as the humorless and misguided bureaucrats it mocks.