While I would tend to rank Chungking Express and Fallen Angels very slightly ahead of In the Mood For Love, the latter is, to my mind, an undoubted masterpiece. The weakness that has crept into Wong's work isn't so much the weakness of middle age, but the weakness that comes to almost all artists who develop an iconic style: at some point it inevitably becomes formula. All of his films deal with the same core concerns (memory and loss), so it was probably inevitable that, as a master stylist, at some point the stasis of content in his work would catch up with him.

It doesn't really matter though, he's still the last truly great director working in film today. Even his failures are beautiful bores.