What I liked about this show? The art style and... nothing else.
Everything else in this show is crap!
The animation is... average most of the time, and when it's not it's just bad.
The story has some potential: a boy without any magical ability decides to fight against his fate and longs to become the strongest in a world driven by magic. I really like the idea and this can be quite interesting if well-written, but unfortunately it quickly gets boring. As I'm writing this review, I am 50 episodes in and I still don't know how in hell I'm going to have the strength to watch all the 170 episodes. One of the reasons why it feels boring, is the pacing, as it's so inconsistent. I'd say that out of 10 episodes, only 2 to 5 are enjoyable.
This show is just another bad shônen cliché, nothing more, nothing less. And this seems to be acknowledged by most of its community, people like it because it is a bad shônen. This kind of show is too much for me.
And not only is this a bad shônen, but the characters are so dull. I can't relate to any of them. And I can't like a show if I don't feel any sympathy or admiration for at least one of the main characters, unless it has really good plot or animation.
I only like a few things in this show: the art style/character design, some of the openings, and Charmy (whom I like more in her "true" form than her "cartoony" one), that's all, far from enough to enjoy 170 freaking episodes!
So to summarize it all, this is way too long of a boring show for me to like it or recommend it. I am still thinking about finishing it because I am sick of dropping so many shows, and some say that the final plot twist is worth watching.
I might update this review in the future, as I get closer to the end.