I can see why it was such a great succees. It's unfortunate that it was bound to be released between such lackluster films like The Sword In The Stone and the horrible Aristocats.
But The Jungle Book is such an amazing film. Apart for the music, which is fantastic, I find the animation breathaking at times. To me, it looks more like the films of the 1940s (think Pinocchio, Bambi) rather than the films which were released before & after. My only drawback about the animation is that in some parts of the movie the background is not that detailed but it does not happen often from I could see. On the whole, the animation is spectacular and is very atmospheric. As much as I love the jungle in Tarzan, I think there's much more to appreciate in The Jungle Book - where no computers were involved to create those stunning shots of the jungle.
There, I said it...