This movie was fantastic, there where just a few wholes that where left in my mind after the movie finished. The first being the centennial prototypes where made without a single ounce of metal. However they have jet engines on the back, a new age polymer in the 1970's let alone the modern age today would never work with a jet engine. Secondly, how are there any electronics let alone on-board computer systems with out a shroud of metal? Another big beginning question that the writers left un-answered is that Professor Charles Xavier is in the start of this movie, however died mid way though X-men : the last stand. That is however never going to be answered now as the original movies at the end of this one are a write off as time has been altered in the past. And my third and final point that I would like to make that I noticed in this movie; in the end of the movie Xmen Wolverine, the movie previous to this one. Logan AKA Wolverine lost his metal. However in the start of the sequel this movie he has metal blades out of his hands when they should in actual fact be bones. As above a great movie however these are pretty big wholes that needed to be filled! There is only one question that is left in my mind at the end of days of future past: is wolverine bone or metal clawed. The reasons being that William Striker has now been taken over by Mystique toward the last few moments and as time has been re written from before the time that Logan gets injected with metals; surely this is an impossible feat!