If you liked the musical, I recommend the movie. I was somewhat skeptical going in, but I did keep in mind how story-dense the musical is. Pretty early into the movie my wife and I were both like, “Oh yeah, it’s a good thing they split it.” It would’ve felt crazy rushed in the medium of film if they had both acts in one movie, or they would’ve had to cut stuff out.
I don’t really blame them for hiding “Part I”; that’s just good marketing, as fewer people would see it if it declared itself a Part I. But it really is worth seeing as a movie, just one that demands a sequel. It may seem somewhat duplicitous but…that’s marketing. Once you’re in the theater they put Part I up on the title card.
I think he said in an interview somewhere he has no desire to or intention of settling down and starting a family. And he has this idea that women will start to want to do that in their mid-to-late 20s, so he makes it clear to the women he dates that it won’t last. They get to live his lifestyle and whatnot for a few years, then he moves on. He claims to be pretty upfront about it.
The older he gets the creepier it gets, but I suppose if everyone is informed and consenting it isn’t ethically wrong.