This film opened to poor showings in the first few weeks. Then Meena Kumari died and it just brought the crowds rolling in. Songs on All India Radio, especially Inhi LogoN ne were played so often that I was sick of them at the time, despite recognising their beauty!
Yes, it did take all those years to make. This was because the marriage was a very unhappy one and Kamal Amrohi also had difficulty finding the money to make the film; looking at the sumptous sets and costumes, not surprising!! Not only does Meena Kumari age and fall ill but listen carefully to Lata's voice. Inhi logoN ne has her 50's younger voice while songs that were re-recorded like Chalo dildar chalo show clear development. I only wish someone would find the Ghulam Mohammad songs that weren't included in the film, because of changing fashions that called for fewer though slightly songs and publish them. Lata in a recent interview (2007) rated Ghulam Mohammad as one of the best composers she had ever worked with, apart from Madan Mohan (a great personal friend). Notice also that you hardly see the actors at all in the Chalo dildar songs, very unusual. There is only a brief shot of Raj Kumar from the middle distance and you only see the back of the supposed Meena Kumari. Kamal Amrohi made a virtue out of necessity and focused on the stars and moon. Any other film, this song would have had close-ups of both of them.
As for this being the finest film ever, I would beg to differ. It means you have missed a lot of Indian cinema, in no particular order, films like Barsaat (old), Devdas (older versions), Bandini, Do Bigha Zameen, Garam Hava, Dastak, Guddi, Aan, Pyasa, Kagaz ke Phool, Sahib Bibi aur Ghulam, Kabuliwallah, Abhimaan, Guide, Sujatha, Bombay ka Babu, Daag, Parineeta (old), Umrao Jaan, etc. etc. And if you valued music more than story the list would simply grow with beautiful scores from Barsat Ki Raat to Naya Daur, Teesri Manzil, Mahal, Aag, Jugnu, Anand, Mera Naam Joker: the list is really endless!
So enjoy Pakeezah but don't miss out on any of the above...

I was attracted to seeing this movie because of this plot and my desire to watch a horror.
To my disappointment, this turned into more of a comedy than a horror. The acting, dialog, and flow of the movie was all very poorly done. Much of it didn't make sense. For example, there's a party of about 30 people and they're all terrified of one person despite them being at a secret location and are all healthy looking young adults and the guy threatening them sounds haggard. I kept thinking, maybe this was a parody of another movie like Scary Movie, but they were trying too hard to make it look gruesome - emphasis on try.
The blood and gore are also poorly done. I've seen Halloween costumes look more believable than this. A guy with his head cut clean off... looked clean - missing signs bone, flesh, blood, and even the head. A strong downward strike with an ax on a corpse should lodge itself into something... seemed like the guy was swinging a bat instead of an ax.
Revealing who the main villain was supposed to be a twist, but contradicted other parts in the story. What was going in the guy's mind to turn out like that? If there was going to be a twist, you should at least build up to it adding mystery and suspense.