The film makes a home in your brain and the only cure is to see it again.

This is a must-see and one of the best documentaries - and films - of this year.

The film's masterful storytelling did its job. The message was clear. No need to overdo.

The thing I enjoyed most about the film is the fact that it doesn't shy away from being a super-sized-cliche;

Must Watch . . . Great Film based on era of 80's . All Department has done their job a very appreciated.Ajay, Imran & Randeep's work are tremendous.. some scenes are far away from the other kind of that films. after watching the film, surely man's have different kind of the negative attitude. Specially this film is made for only some higher class of the people..Dielouges are the major highlight of the overall film. e.g.=> bas dua me yaad rakhna, Agar me hero ban gaya to pehchan bura man jayegi . . !!Director Milan done Luthria great job. Major Impact on the Box-Office Collection under the production of Balaji Productions ..In short Paisa and Time Both are vasool .. . This Films are definitely of "Top 15 Films of My life " Bdw not watch till now, please watch at list once . . .!!! #YD

Milan Luthria is not a big director in Bollywood, but he's done very well here. The direction is brilliant, as is the cinematography. It recreates the 70s era perfectly.The film tells the story, from the point of view of a police officer, about Sultan Mirza (Ajay)who went from nothing to the ruler of Mumbai, and Shoaib Khan (Emraan),the only son of an honest police officer who wants to make it big so badly.The performance by Ajay Devgan is simply superb as Sultan Mirza; there isn't a role he cannot do. Emraan is good as Shoaib Khan, but I think his serial kisser/lover boy image just got the better of him here. Kangana Ranaut is good as one of the female leads, as is Prachi Desai as the other one. The problem is that Prachi is that she isn't as convincing in the movie in her role as Kangana is in her role. Still, Prachi has made a mighty good effort.The film is full of good dialogues; a lot of them are one liners. I can tell you one thing for sure: you won't forget them that easily after you've seen it. The music of the film is great. The song 'pee loon' stands out from the lot.Verdict: A good gangster flick providing wholesome entertainment. One of the best films of 2010. I give it 9/10

I only have one word to describe this movie - Abysmal !! Right from the start I knew what was going to happen and it exactly happened just as I had predicted (Utterly predictable and boring storyline !) . OK so you are not going to believe this but frankly, I finished seeing the whole movie in an hour (Guess how, by fast forwarding it at many unnecessary scenes only in an hope that I might get to see something different in the climax, but I was proved wrong !) I normally do not write reviews for bad movies but I am just writing this in order to help you from not watching this rubbish !! P.S.:-I would have given this movie 0/10. The one star is only for the power packed performance by Ajay Devgn and the last 30 seconds before the end credits rolled. I have one request for Milan Luthria Sir : "Please stop making such movies ! I could not believe that you had made this movie especially after that well made taxi no. 9211 (Though it was a rip-off of "Changing Lanes" but the treatment was novel and different)

Ajay Devgan rocks in this movie. a must watch movie. Excellent. You seldom get period dramas in Bollywood which are not about historical characters. This year that way has been very lucky that way. Couple of months ago we had Badmaash Company and now we have Once Upon a Time in Mumbaai. Of course both are completely different from each other, the first being set in the fast 90s and the latter being set in colorful 70s. And director Milan Luthria makes enough efforts to make OUATIM look very authentic and worth a watch for its settings.Settings apart the film has its pluses with some superb performances and great dialogs. However the problem with the film is the not so new storyline and the very slow screenplay. Though the characters are well established and well rounded the writer takes the entire first half to do that without much movement in the story. And then as you expect fireworks in the second half it fizzles out too fast.OUATIM is the story of two gangsters. While one was ethical the other was reckless. It has inspirations of the characters of infamous smuggler Haji Mastan and now infamous don Dawood Ibrahim. The film is about Sultan (Ajay Devgn) who labored through his childhood and became a smuggler as he grew up completely ruling the sea routes. He however always preferred keeping the city clean and never smuggles which was against his conscience. Shoaib (Emraan Hashmi) is inspired by Sultan's life as a child and wants to it as big. He is a son of a police officer but has no inclination towards the law. As he grows up he makes his way to Sultan's gang and proves himself good enough to go up the ladder fast. However his reckless ambitions soon outgrew Sultan and he decided to take over the city on his own.The story is built on the line – 'behind the myth is the city's greatest betrayal story'. The screenplay does not give much importance to the betrayal. The slow pace of the first half could be a put off. Also funnily Sultan and his girlfriend Rehana never seem to age as they continue to look the same even as Shoaib grows from a child to rustic young crook.The film has its pluses. Luthria has taken care of everything – right from trains to cars to sunglasses to shoes to buildings! Everything takes us back to the 70s. Luthria handles the dramatic moments well and great use has been made of dialoguebaazi. All actors have come up with some memorable performances. Ajay Devgn's overpowering presence is matched by Emraan's charm. Kangna Ranaut and Prachi Desai do their bits well though they don't bear many consequences on the story itself. Randeep Hooda is effective as the police office.Overall, 'Once Upon a Time in Mumbaai' is an entertainer. It does not need any effort to be understood of liked. It is the mere magic of characters created that makes this film worth watching.