Epic is a delight, a visual imagination feast. What it lacks in complexity, it makes up in intention.
The good. Gorgeous graphics and animation. Very imaginative setting. Interesting story. Well paced scenario. Funny dialogs and situations.
The bad. Over simplistic characters and concepts. Underdeveloped B stories. Swords that are not used. Human world not as well done as the forest world.
The ugly. Nothing.
The result. Highly recommended for any kids. Adults will like it, too, it's just that they might find it lacks a bit of depth.