I consider Rainer Werner Fassbinder to be the single most overrated director of all times. I have desperately tried to understand what all the fuss is about when most of his movies seem like movie Experiments gone badly wrong. Effi Briest is at least an accomplished movie with a unique style, although at 2 hours 15 minutes it's pretty slow and overly long.
Fassbinder being an eccentric artiste, couldn't just use the title of the novel but came up with a monstrous title (which the IMDb spellchecker doesn't allow me to quote here) that doesn't make much sense in German, but seems to give the movie a Marxist twist (it alludes to "many know their possibilities and requirements but chose to support the ruling system"). The title is usually mercifully shortened to just "Fontane Effi Briest".
At the time, the sound recording of films was still a considerable technical problem, so that the entire film was dubbed (the voices and partially also the background noises were re-recorded in a studio and added to the film in post-production). The dubbing was done very meticulously so that the voices are in perfect synchronicity with the lip movements. The voices are in several cases not of the actual actors, for example Eva Mathes was dubbed by another actress, and voiced yet another actress). This gives the film a touch of artificiality and a sense of heightened reality, which goes well with the slow pace of the story.
So, for a Fassbinder, it's a surprisingly watchable movie. At the same time, there is no narration, no tension, nothing is building up to anything. It's love it and sit through it, or switch off the video.
Interestingly, Fassbinder also has no intention of putting a new angle on the jaded story of the romantic girl falling victim to an uncaring world. I would love to see Effi as a competent woman trying to make her own rules, or even as a femme fatale for a change.