This book is a great resource for all those Venus fans who have been confused by differing information from internet sites. It provides clear, definitive information on Venus, as well as loads of great pictures. For anyone running a Venus website, this book is great! However, if you're just buying for personal entertainment, save your money and buy some SM manga instead. ;)
My favorite parts of the book are the Sailor Venus Episode Best 5, Mina's Friends, and the Poetry section. The Episodes section has the best five episodes that reveal Mina's true nature. The Friends section has short descriptions of all her friends and their relationships. The Poetry section has translations of four poems, including Route Venus by Naoko Takeuchi (SM creator, duh). Other good points - the book is simply stuffed with illustrations, and it's printed on glossy magazine-quality paper.
The worst parts about this book are that it seems to have been written before SM SuperS and SM Sailor Stars, so Venus Crystal Power and Venus Love and Beauty Shock are never mentioned. Also, the narrative viewpoint of the book often switches between first and third person, which can be confusing. One of the worst points is that Mixx did not account for the fact that English-speakers look at pictures from left to right. Therefore, when pictures are arranged in sequence, they must be looked at starting on the right. I can only imagine how confusing this would be if you didn't know Japanese was read from right to left. Also, in order to fit into the space where the Japanese characters were, the captions are turned on their sides, which is tiring to read.
To recap: Buy it if you want a good Venus resource (or if your goal is just to own every SM product...). Don't buy it if you just want entertainment (buy manga instead! manga, manga, manga!).