I absolutely loved this book, a must have for anybody who wants to run a game with a little more "oomph" than normal or wants to throw a few new twists on a monster to scare their players.
The new mythic abilities were very interesting, and I could envision a few jaw-dropping moments using them. The new legendary item rules were absolutely amazing, and were something I'd been trying to work out for myself for a long time.
The monster are terrific, let me just say, I pity the party encountering a mythic red-dragon.
I'd have to say my favorite aspect of the book is the artwork, there's some really spectacular art in here, and I loved seeing the mythic Iconics.
Overall, I'd say this book is definitely of Mythic stature.
