Oh hey look! A great movie that's not coming from that well known handful of producers who know what they're doing!
Truly, for something that is clearly a children's film, it is quite capable of drawing a heartthrob from basically anyone watching it. While not exactly action oriented, you'd be surprised at the scenes the movie dares to throw at its young viewers.
Well-done mix of a traditional and CGI animation.
Another strong point would be its characters, since we can find a surprisingly sad backstory or two. The relationship between Mei and Gabu is amazing for the reason it has good firm grounds to turn into the most valuable friendship, even with their differences as species.
An adventure with strong slice of life tone, which is for obvious reasons hard as fuck to pull off properly. It may not be action packed, a comedy gold, a fanservice mine, or an epic fantasy and thank Lord it isn't trying to be, because that made it just right.