First lesson that some film makers (particularly those inspired by Hollywood) need to know - just 'style' does not sell. I guess Tashan when translated will mean style. Second, if you are hell bent on selling style, that does not spare you from having a decent story.
Tashan has some story which could have sufficed with some better director. But it is not slick. For example, all three - Saif, Kareena and Akshay - are narrators at different points in the story. But this setup is not utilized to properly. There could have been a better mix and match of their narrations. Actions sequences are from the seventies.
Cheoreography of the film is awful. I think Vaibhavi Merchant just sleep walked through this film. Vishal-Shekhar have put up a good score but it does not belong to this film. Why is there a sufi song (Dil Haara) in Tashan? Why is the cool Hinglish song (Dil Dance Maare) not on Anil Kapoor when he is the one who is English crazy?
Akshay Kumar is the saving grace of the film. But he is in his stereotyped self. You won't mind missing this film.