many reviewers said it got "a lot of style over substance"
I can understand the claim, but I would also point out it is a game where you have to find the substance yourself.
it is not one of those movie like things where all is shoved at your face.
The main concept of the game is lingering memories
you meet many ghosts that are still waiting for something, and help some to find their closure
if you don't take notice of the memories you see, you won't get to notice their stories.
So, basically, if you play games just to finish them and then sell them, this is not the game for you.