Film-maker Yusof Haslam has the pulse of the local Malaysian audience and Janji Diana has the rights ingredients to succeed. Firstly, there is Erra Fazira the Malaysian box-office queen who looks stunning in this film. Add to this lots of big bikes, a smoldering love story and deft pacing, and you know that Yusof has another runaway hit on his hands.The movie is about rich wild child, Diana (Erra Fazira) who hates men. With a womanizer for a father, and her own ill judgment when it comes to men, Diana is right to believe no man can be faithful. Into her life enters architect, Haikal (Rosyam Nor) and the two fall in love. But then Diana learns that he, too, has been two timing her with his fiancee, Sabrina (Sarimah Ibrahim). But of course, all is not as it seems.Erra Fazira, though looks great, turns in an unconvincing performance as an arrogant, rich lady with hated in her heart. However Rosyam Nor, Faizal Hussin and Sarimah Ibrahim (a real hoot) help to balance the acting scales. However the actors are hampered by the leaden dialogue and bare-as-bones script.Still, Janji Diana is short and sweet, and the director doesn't allow the pace to lag. Easily a Yusof Haslam's decent movie.