I thought it was pretty nice, the fight scenes all were interesting and there were some parts(quicksilver) that were very enjoyable. Although i wouldnt call it the best x men movie, personally i also liked X2. What i do like is this basically gave them a "Everyone is alive and we can start over" thing so they have a wide variety of ways to go for X-Men apocalypse. Although you would think that some of the other people would be better of dead, or they will just cause more problems. *cough* Jean *cough*
Also felt like Magneto hunting down raven to kill her was pretty stupid. I know you are the bad guy and you wanted to make sure to not let them get her DNA and such but how stupid can you be in some places? Lets kill her in front of a giant crowd and show everyone how dangerous mutants are and then be the reason they get her DNA.