I must confess, I don't know if I've ever seen another movie starring Leslie Cheung. I know he's one of Hong Kong's most popular and respected actors, but that would mean seeing good Hong Kong cinema, as opposed to the narrow spectrum from Kung Fu to John Woo. So, I can't really say anything about how Cheung's last movie fits in with his body of work; just how it is as a ghost story/thriller.
And that's not so well.The set-up is okay, with Karena Lam as a young woman seeing ghosts and Cheung as the psychiatrist who works with her. He doesn't believe in ghosts, and that the girl's problems are more earthly (she has attempted suicide multiple times), but also grows fond of her.
There are a few problems here. The ghosts Lam's character sees don't have any connection to her; some are connected to her apartment, but that's the closest to a personal stake they have. The first half of the movie is pretty clunky at times, with a lot of inner monologue/exposition awkwardly delivered. And then the movie takes a sharp turn midway through.
Normally, I like that. Here, though, it doesn't quite work - the plot of the first half is wrapped up in too pat a manner, abruptly reducing an intriguing lead to a bland supporting character.Also, there are scenes where I got the impression that the writers initially wanted to go one way with whether the ghosts were real or imaginary, but decided to go the other without making the rest of the story consistent.