While the premise of the story of Midori no Ou, or Verdant Lord, showed alot of promise of complexity and interesting relations of the characters and the world they live in, it's excecuted in a pretty subpar manner, progressively moving the ideas that made the concept interesting into the gutter, adding more and more action and in general fighting, while also raising the proportions of the conflict in the same way. By itself it's nothing bad, but it leaves an unsatisfied feeling since you can't get much invested in the characters involved, who misses motives beyond their most basic "purposes", set in the manga, and personality in general.

Art-wise, the characters looks well, despite lacking much of distinctive personalities, the mech design is plain and practical, and the Athreusa, with all it's shapes and forms, looks very creatively thought out and interesting. Also the action scenes are excecuted well and fluidly.

In short, the manga is pretty nice if you are looking to read something action-packed, with not that complicated story and not too long as lenght, having on, conceptual level interesting story, although rushed too much at the end.