Most of the Amir Khan movies are copied from Hollywood films (Dil Hai Ke Manta Nahin (1991), Jo Jeeta Wohi Sikandar (1992), Hum Hain Rahi, Pyar Ke (1993), Baazi (1995), Aatank Hi Aatank (1995), Akele, Hum Akele Tum (1995), Ghulam (1998), Mann (1999), Rang De Basanti (2006), Fanaa (2006), Ghajini (2008), Dhoom 3 (2013)) but never credited them. Because those days we have no internet or most Indians not used. Those days are gone. That is why, they are crediting now. This suits to every copycat/inspired films from every film industry.
Coming to the film it's Ok; not bad not good. If you're die hard fan of Amir, watch in theatres. If you're not rewatch Forest Gump or wait for the OTT release of LSC.