Ha, great ending. Trust Toriyama to always have some joke.
Pretty good. All the characters are great and Kaijka is a good main character. He has cool powers, especially the ability to remove evil from people. I like that all characters have their own motivation and goals, and it makes sense when they work together. No real standout action in this one, but even some okay Toriyama fights are pretty good in comparison to much else.
Story-wise, it's pretty simple and it's pretty obvious what will happen at most points. But works well for a single volume.