Sure, X-Men: Days of Future Past threw more X-Men into a movie than ever before and helped people forget about the abomination that is X-Men 3. But is it perfect? Far from it. Spoilers, for those of y'all who haven't seen the movie yet.
The CinemaSins breakdown of director Bryan Singer's return to the X-Men film franchise points out a lot of the movie's plot holes in the usual snarky fashion. Frankly, whenever you've got as much super-science and time travel going on as in DOFP, the logic's going to break down at some point. Or, erm, at a lot of points.
It's good thing that it's a good-looking movie filled with all sorts of fan service, huh?