Unless you are well-versed in a former iteration of the HERO system, this book, weighing in at 660+ pages, just rules, no genre materials--JUST HERO SYSTEM RULES--will likely be way too much. If you are new to the system or gaming in general, get the Hero System Sidekick, which is a 120 page book with all the essntials of the system, which may be all the rules you'll ever need. Later, you can graduate to this monster.
The revision fixes errata, refines the rules, and offers a ton more examples of the rules being applied. I wasn't sure it would be worthwhile to get this , since I had the regular 5th Ed., but I have to say unreservedly, yes, get this. You will not find a more flexible, interesting, exciting, and fun rule system, and the best thing about it is: it is TRULY universal, and it TRULY works in all genres. This is all my groups plays now.<br><br>
<b>LIKED</b>: Massive, covers everything, even rule mechanics you never thought you'd ever need. All the rules, with tons of examples, in one place.<br><br><b>DISLIKED</b>: Off-putting to new gamers or those new to the HERO system, in that it is a book of rules only (no genre info) that is more than 600 pages, and is 2 or 3x as thick as a D&D 3.5 Ed book.<br><br><b>QUALITY</b>: Excellent<br><br><b>VALUE</b>: Very Satisfied<br>
[4 of 5 Stars!]