Many have said this before, but I'm afraid I have to repeat the opinion on the account that a surprising many have decided that Zinda is worth of anything more than 1 star in IMDb. Zinda is a unscrupulous photocopy of the masterpiece Oldboy, and should be avoided, if not boycotted.
Some will claim that Zinda is a 'tribute' or a 'remake' of the Oldboy. To them I ask one question: "What kind of filmmakers make remakes of a movie when the original came out two years ago and has been selling DVDs very well internationally?" It seems that this particular brand of Indian cinema has decided that it is quite content making money off of other people idea for free. And though it is impossible for the original filmmakers to sue the filmmakers of Zinda (on the account that Indian copyright laws does not allow for such suit), Zinda should be remembered as a true stain on the development of Indian Cinema.
Because it has photocopied a great movie, Zinda avoids being an absolute terror of a movie. However, this does not excuse Sanjay Gupta and the section of 'Bollywood' that has involved itself in Zinda's production. Because of the blatant plagiarism, and the Zinda's makers absolutely refusing to apologize and reimburse the original filmmakers, I must say Zinda deserves 1 star, if not 0.