once upon a time in Mexico

This is Robert Rodriguez's third (and hopefully the last) movie in "El Mariachi" series. Let me tell you before you jump to any conclusions, I am a big Desperado fan, I loved the movie because of its sheer brilliance in style. But "Once upon a time in Mexico" seems like a ghost of Desperado. Characters are there, but the conviction is lacking.
Some of the characters are under developed, for example Eva Mendes is completely wasted, Johnny Depp is good, but Willem Dafoe is wasted. Too many plots and subplots and the whole story gets lost.
At best a time pass fare....