My preschooler loves this show. He is on his 4th re-watch of the pilot episode back to back. I think it is a great problem solving show with action and a good story.
The animation is pretty and reminds me of paper doll cutouts. The story progresses in a fashion that does not feel rushed or contrived. I like that there are smaller problems to solve that lead up to the final resolution.
The show kept my child engaged throughout and he was interested in what the characters were doing on the screen. I would definitely recommend this show for preschoolers.