As far as where this one sits on the film map, it's somewhere between Belle de Jour and Tinto Brass's Caligula.
The most important credit Pasolini's setting of the Canterbury Tales deserves is for its dismissal of the usual on-screen morality. Such candor seems essential to the nature of such a narrative (being much more appreciated than the stifled decadence of Keir Dullea's Marquis de Sade or the early Warhol/Morrissey efforts). This is most effective because the film also depicts the baseness and depravity of the late Middle Ages. Everyone's fornicating or trying to fornicate everyone else, with lots of potty humor thrown in just to make sure that it wouldn't be taken too seriously as a foray into art-house pretensions.
On all other counts, it's overblown and a bit sluggish, with an especially disappointing outcome au montage son. And non-professional actors are much less effective in adding a dimension of realism than they are in inducing a sense of self-mockery. The imagery is shamelessly ribald although not extreme, and the storyline is far from seamless. Far from Pasolini's best, although perhaps a good preparation for the far more intense Salo.
