This comes from a guy with no comic book reading credentials.
Quicksilver's return is not to be missed and quite possibly the highlight of the film. Furthermore, this film is set in the 1980's, Jean Grey's neon and Scott Summers' shades are especially representative.
There are also some bloody good surprises.
There's not much more that I can say or want to say. This film was nearly as fun as Captain America: Civil War.