Jean and Creed are the only two X-Men left in the AoA, they're both de-powered, and the X-Terminated are the central focus of this new ongoing series. Wonderful introduction to the dystopian AoA and its inhabitants, as well as a good general overview of the power structure and how things function in this desolate place.
Even if you've never read an Age of Apocalypse story before in your life, you can pick this up and start off at a relative beginning, though I would highly recommend picking up Uncanny X-Force #19.1 first before reading this. That's not too bad considering how long AoA has been around, and that #19.1 is still available on the rack at most shops, PCC included.
If you can't stand Humberto Ramos art (like myself), don't let his cover scare you away, Roberto De La Torre is the interior artist, and he knocks it out of the park.
The Prophet/Daredevil (Keeper Murdock in AoA) fight alone is worth the price of admission on this one, and there's a nice little cliffhanger on the final page to boot.
Pick this up.