Let's start with the bad points:

Rating: 8/10 (1 April 2007)

I think that one or two of the performances from the lead actors were overrated.
Matt Damon, for me, seems to fluctuate between good and bad performances. He was great in The Talented Mr Ripley and The Bourne Identity/Supremacy. But I thought this was one of his worse films. His acting seemed quite wooden and forced, and I don't think he was comfortable in his role of a boyfriend.
I also think that, early on, Jack Nicholson showed his age, although he did improve greatly as the film went on.
On a positive note, Leonardo Di Caprio was outstanding. He's one of the most underrated and best actors around at the moment (he's come a long way since his teenage heart-throb status) and could quite easily have added this to his best actor nomination in the Oscars this year. This film would have struggled if it were not for Di Caprio.
As far as the film in itself goes, I hadn't seen or heard much about the original Hong Kong version and was glad of it, as I could judge this solely on its own merit.
It's thrilling, with so much suspense. Who's going to make a breakthrough first? Costello's men or the Police? I hadn't seen this before the Oscars, and at first I couldn't quite work out how on earth best Motion Picture didn't go to Little Miss Sunshine. But now I can understand why.
All in all, simply brilliant.