Three times Amitabh Bachachan what is there not to love !(Triple Role). The range of characters Amitabh can play is simply amazing. R.D.Burman is at his one of the best composition with the music/songs. Given the time period in the Indian Cinema at the time, don't expect a whole lot or try to compare it to anything as it won't be a fair comparison.
The plot of course is nonsensical and having so many tasty ingredients in it makes it almost too rich for someone not a true Bollywood or Amitabh Bachchan fan. The real reason to see this movie of course is to see the Big B playing three very different characters and doing a surprisingly good job at all of them. The 'aspiring actor' Amitabh character is the most fun to watch and has some great comedic scenes although they are absurd even by Bollywood standards. Most importantly however,in our opinion this movie marked the end of Amitabh's golden era. The notable exception being 'Sharaabi' the following year for which he received a nomination for a Filmfare Best Actor award. The injury on the set of 'Coolie', questionable movie choices and the great equalizer of age started his inevitable decline but his was a flame that refused to be extinguished. After realizing that he could no longer do the leading man roles that his audiences expected from him, he has made a graceful transition into more mature roles. 'Main Azaad Hoon' and 'Khuda Gawah' were the standout beginnings in that era with 'Mohabattein' putting the finishing touches on it. But for those fans of Amitabh of yesteryear and Bollywood masala at it's zaniest I would heartily recommend 'Mahaan' as one of that era's swansong films.