This story has alot of balance and the authors seem to have an aim for what they want it to feel like, that they stick to.
From what I can see, that aim is to give readers a fun ride, whether that is with comedy or fighting or power ups. Sometimes it can seem random or too much, but there is always a reason behind what is happening, and plenty of overarching mystery in the background, plus the theme of the relationship between robots and humans is constant.
The 'fun' feeling to it might turn some away, thinking it will just be milked for that, but that's what I mean by balance: whenever it starts feeling like the fights or w/e are leaving behind the plot, the story re-centers itself and the plot progresses, and the things I thought were distracting from the story, I find out were important to it all along.
Tl;Dr:
It explores serious themes in a not-so-serious way, with a good attention to detail.
If you like comedy, I recommend it.
(There's plenty of other good stuff in it, but if you're not good with comedy, you probably won't enjoy it very much.)
This is one of my favorites, so I hope more people try it.