I have watched this anime film on Youtube.com, and I find it an excellant anime film from 1968; I have also found out that this film was one of the first movies that anime legends Hayao Miyazaki and Isao Takahata worked on. And being that the film is setted in The Norse lands, I am a fanatic on Norse folklore and myths (though I didn't see any trace in the film).
While watching the movie,I found the little children (Philip and Mauni), and Koro the bear cub to be very, VERY cute; And I love Hilda too;even though she can be evil (under The Frost King's control),but she does have a great voice.