Great Power updates the ICONS power rules with more detail, more flexibility, and greater variety, while remaining true to the original game's rules-light sensibilities. Extras, Stunts, and Limits allow powers to be customized to suit just about any concept a player can come up with. More detailed information is provided for nearly every power, explaining how to apply it in game terms, and indicating which Extras and Limits work well with it.
The power list here is better organized than the one in the original book, so it's easier to find the specific ability you're looking for. Many 'constructed powers' like Prehensile Hair and Possession get their own entries in the alphabetical list which refer the reader back to the necessary Powers, Extras, and Limits used to build them. It's very easy to use as a reference during play.
The artwork is by Dan Houser, so the book has strong visual continuity with the rest of the ICONS line, but the updated layout and power-icons give the whole package a fresh graphic look.
Summary: If you play ICONS, you want this book!
[5 of 5 Stars!]