Overrated and here's why.... *spoilers*
Looking aside all the eye-candy cinematography and the solid direction and good acting and the funny skits, the plot was kind of hollow..
I say this because firstly, despite all the knots and ends the story was leading to: the person who is mainly suspected as being the killer was found out pretty simplistically by tracing down the address on the postcard on which he orders songs to be played every night the murders take place. I mean no-fancy brain work involved here.
Secondly the entire movie was standing on whether he would confess to it or not without there being any solid proof of him doing it. It was like a cliche..
Overall, I went in expecting to be blown away.. to see some masterpiece psychological drama kind of crime/detective movie.. but the story was too simplistic for me. Maybe that's why many people like it... (it is rated 8 here on imdb) but it just doesn't cut it for me.. You just can't be great by staying ordinary.