It has potential to go darker like Rave Master. After that Happy flashback, which is something I didn't expect, I have a feeling it wouldn't go light-hearted series like Fairy Tail. It's not set in stone, only a possibility.
Shiki's gravity powers are not typical for shonen area. Kind of surprising that Happy is a mecha here so I expect more machines from Rebecca to be used. 5/5
Even after Mashima screwed up his last manga, the popularity is still there. I'm sure there's 95% chance he'll screw up again. Hope he proves me wrong. I like the first chapter due to the concept involving robots and space despite those "friend" speeches.