First to start with, MR. Taran Adarsh who wrote the review for the movie on BollywoodHungama says that there are no mistakes in the movie. Thats wrong on seeing the movie you can find not 1 or 2 but more than 4 to 5 mistakes..
The film is a total waste of money and time, this type of films have been made in past so many times, but the forgetting his memory part is different, but when you see the movie in its initial stages, you cant say he has such a problem, or rather he has any problem. He keeps on clicking photos, but not once it was shown that he has forgotten his memory or something.
Aamir Khan has acted well, but there is hardly any scope for him to show his talent, just that he has to show his frowning face and thats it.
I read the review on Bollywood Hungama and went to see the movie, but was throughly disappointed. They have given it 4.5 Ratings. None of the viewers will tell it as true, as the same time they have given RAB NE BANA DI JODI 2.5 stars, audience will totally agree that the later one was a far better movie than Ghajini.
In short waste of money and time, not at all recommended.