I love Allison's books; I find them delightful.
This one is full of cute illustrations of over-the-top couples with gigantic smiles having a good time so that these cartoony people are less pornographic (or offensive, if cartoon sex is upsetting to a reader) and more looker-friendly, which helps if there are questions about the text. (Moon Goddess illustration on print page 84 is my favorite. They're obviously really excited about what they're doing)
While I don't always personally agree with all of Allison's information/suggestions, I 100% support the greater goal of these books: To create a conversation. Because these books are so non-threatening, they're a great way to open a dialogue with a lover who may be reluctant to admit s/he has something new to learn. I think we've all run across that person a time or two (some of us would like to run over them. With a truck. So they know how it feels) and while discussing your needs with that person can be difficult, leaving this book lying around - it's got a provocative cover so it's going to get noticed - might be a gentle, playful way to ease into what you've been wanting to say but didn't feel you could. In addition, for those who are not yet familiar with their own workings or the workings of their partners, the information and suggestions in these books are frank, honest, friendly and easy to understand but not preachy or dirty (for lack of a better term). It's not dry or boring and the embarassment factor should be pretty low because everything is presented in such a fun and happy fashion.
Pretty much, this book, as well as the others I've read by this author, are wonderful I-want-more-from-sex-but-don't-know-what-or-how-to-find-out primers.