I wanted to figure out just how much content this game has so I timed myself on a full playthrough.
Apart from chapter 1 and 2 which are pretty much twice the size of the rest of the chapters, each chapter took me an average of about 3 hours to play. It took 33 hours to play all 9 chapters. I've played it a couple of times before so I wasn't going slow.
That's a LOT of content.