Simply lovely. Charmingly formless, following Tavernier's whims and passions. He highlights some obvious directors (Renoir, Carné), though not always in the way you'd expect. Those who like to geek out on technical stuff will dig Bernard's analysis of focal lengths and lens choices. Totally over my head but you've got to admire how animated he can get about stuff like this.
Tavernier also defends some less fashionable directors (Claude Autant-Lara, for example) and spotlights some peers who don't get their dues. He makes a very convincing case for Claude Sautet as an overlooked great. My watchlist grew exponentially over the nearly 3 hour running time.