Princess in the Birdcage Kingdom is, in short, an okay supplement to the series in case you didn't have enough of the anime. The plot comes out of seemingly nowhere and the ending is linked to the xxxHolic movie: A Midsummer's Night Dream, though that isn't terribly important. What I found most confusing was that some of the logic didn't quite seem explained enough in the movie. For instance, it's never really understood why the ring was necessary for the ritual, or the truth as to what "power" Tomoyo and her uncle held. In my opinion, the guard was a minor character and didn't needas big of a role as he had, while other characters (Fai and Kurogane) took a backseat, especially near the film's end. However, there are some positives; the action and plot makes some degree of sense and creates some intrigue, and Syaoran's barrel attack was the best scene of the movie, as well as Sakura being given Tomoyo's ring. Overall, I am of the opinion that if you enjoyed Tsubasa Chronicles, then this movie is arguably worth giving a try, so long as you don't care about the little details too much. 7/10.