Magneto's grand scheme to reverse history is coming to fruition. Nightcrawler brings the mutant Destiny to New York to confirm Bishop's claim that the alternate, proper history has Charles Xavier alive and Apocalypse no where in sight (so, a better world). Colossus has freed his sister from a horrible prison in the Rockies and brings her to help get Bishop back in time so he can prevent Charles's death. Gambit has gotten a piece of the M'kraan Crystal also needed to travel back in time and to other timelines. A lot of other plot lines are added to keep things exciting.
While the book does move quickly to an expected conclusion, the story still feels like it is padded with a lot of unnecessary subplots. Sure, they add color and let the reader see re-imagined X-Men and have some cool action sequences. But they could easily be dropped with hardly any consequences for the main story.
The art is a bit grungier than usual comic art and is interesting for a while but gets a little wearisome for me. About half of the X-Men have tattoos around their eyes or wild, unkempt hair, which is supposed to make them look edgier, but looks more like a fad from the 1990s (when the comics were written). I understand the choices narratively but don't find them enjoyable.
For a big epic sprawling story The Age of Apocalypse ultimately feels rather ho-hum. It lacks any great moments or character insights. The drama is as compelling as most "fix the time stream" stories, which I usually find not too compelling. All the big sacrifices people make in the alternate time seem less weighty when that time is basically erased by the end of the story.
Overall, this is an average series. There is a fourth volume with supplemental material and stories but I've already had too many extras, so I won't be reading number four.