Ok, full disclosure--I was very skeptical of this model to begin with because I have completely divorced my class from traditional homework. My homework now follows one simple rule, inspired by a quote from Joe Bower: "homework should be inspired, not assigned". Eight hours at school is enough, homework has little to no effect on comprehension, and it's not worth the enforcement and grade damage that often follows. I want my class to be so engaging that kids want to go home and learn more or work on their project because they are invested in it--not because I make them.
I think this one-on-one environment is the major draw for the Flipped Class and its the primary reason for any success it enjoys. This is how my class works too, but without the homework instruction. I mainly use the project-based model or a simpler version I call PBL-Light. I remain very skeptical of any homework, especially instruction without facilitation. In my opinion, the Flipped Class model could work if you ignited a fire of interest before class ended and provided an engaging video for students to find out more at home if they are so inclined. All that being said, to each their own--we all need to find the method, combination, or mutation of methods that works with our own philosophy and personality. I just had this epiphany about the real power behind the Flipped Class and thought it was worth a second mention.