'Jaane tu ya jaane naa' could easily be a book. The kind of literature that the likes of Chetan Bhagat and Neelesh Mishra have been coming up with - modern Indian English literature.
The books that these guys have come up with over the years have certain common traits. Breakups and relationships at college are as common and periodic as semester-end exams. If a father offers a drink to the daughter's boyfriend, it's just a nice polite way of getting to know him.
And the climax of such books is often cinematic and humorously gripping. 'Jaane tu..' has a similar climax.
Overall, 'Jaane tu..' like these books is 'formula-based'. Romance, friendships, sibling relationships, parental pressure - the movie puts it all together.
Abbas Tyrewalla takes a pinch of 'Kuch kuch hota hai' (the scenes where Aditi gets jealous of Meghna and Jai), adds two spoons of 'Chalte chalte' (the presentation, the flashback to-and-fro is very Chalte Chalte-esque.) and garnishes it with 'Dil chahta hai' and 'Ishq Vishq'ish situations...
The film is most certainly entertaining - but you always keep thinking you've seen this somewhere.
The best part of the film is the natural performances by all the actors. (Except Sohail-Arbaaz Khan - whose loud acting will not help but remind you of 'Hello brother'. And the climax. Which many of us will find funny - I frankly didn't.) Genelia is good - she looks pretty throughout the film. Ratna Pathak-Shah, Naseruddin Shah, Rajat Kapoor, Paresh Rawal and Sohail-Arbaaz Khan are good. Prateik Babbar is very impressive - his resemblance to Smita Patil is just one reason.
Imran Khan - THE boy (who people think looks like me *grins* ) is VERY good. He did NOT remind me of Aamir Khan by the way!By the way, just a shallow comment but he needs needs needs to get his eyebrows shaped.
But hey! If 'Jaane tu...' were a book, the eyebrows wouldn't be much of a problem.