My husband picked this up at the grocery store the other day quite by chance without having heard of it, and our children haven't stopped watching it since.
It is an extraordinarily beautiful film in every way -- the visuals, the voices (we watch in the original French), the music, the story. The animation is exquisite. Colours are saturated and stunningly gorgeous, and there is much use of a richly patterned ground -- mosaic tiles, fields of flowers, tree trunks, a lion's mane... The drawing of the characters is very different from that in Hollywood animation, and so some viewers may need to adjust to it; I take issue with the previous reviewer who says that the 3D animation is "not that great" -- it is stylistically different, intentionally so. The animator is trying to achieve a different feeling and relationship between the viewer and the story; he is not trying to persuade the viewer that this is the real world, but rather, transports the viewer into a magical otherworldly realm. Figures are elongated, patterned grounds are flattened, but faces are delicately drawn and eyes are riveting.
The story is about the rivalry and love between two boys, brothers for all intents and purposes, and is elegantly told. This film is remarkable for the positive way in which it portrays the richness and beauty of Maghreb/North African culture.
This is a stunningly beautiful film for the whole family, and I am hard-pressed to think of a finer animated tale.