My health is just as many that I not nearly as intoxicating find the finished films like the books. This is (in addition to the shortened storylines) mainly to details that come a little short by the term limit in the movies. If I then look at my Bonusmateial the Ultimate Editions, I have to say but then: "It's all been lovingly thought out and detailed, you take it just not right in the finished film true." This book still sets while an ordinary shovel it: I would have never imagined how much detail but all the props! The book are attached, so I have to amaze some of these little touches. My favorite examples are the program notes for the Quidditch World Cup of the Yule Ball. I do not remember to have seen these props in the movie at all, yet they were beautifully decorated and filled with the "real" program points. Also attending and a very funny idea, I think, are stickers for potion bottles, just a bit too bad they also use.
Content, I can not complain, it put a lot of background information in it, including a small preview for "Deathly Hallows Part 2".
The only "downside" of this book is that the cut edges due to the additions do not completely flat close (it is just something between the pages), but since you can loose overlook about it!
My conclusion: Those who enjoy the making-of the Ultimate Editions, you can do nothing wrong with this book, we learn still so few and the offerings are just the Pops =)