Its pacing is too deliberate, and it doesn’t have a light heart. That’s revealed in the handling of some characters named the Brownies, represented by a couple of men who are about 9 inches tall and fight all the time. Maybe Lucas thought these guys would work like R2-D2 and C-3PO did in “Star Wars.” But they have no depth, no personalities, no dimension; they’re simply an irritant at the edge of the frame.

Roger Ebert

Chicago Sun-Times

Willow is not without its charms - the effects are more than special, the set-pieces suitably epic but it just doesn't fulfill the promise of certain other fantasy films.

Ian Nathan

Empire

And Willow, a pleasant but bland character, doesn't often inspire much sentiment, so the film lacks an emotional center. In place of this, it relies on so much overstatement and repetition that it's possible to grow tired even of the adorable baby.

Janet Maslin

The New York Times