Things with this anime is: it is hot-blood, a bit cliche, very fluid action scene, smooth like Stein Gate, and does the job well as an anime.
I mean, the pacing of the whole anime is so nice. It is very enjoyable to watch through this popular shouen.
Yes, I know the story is not as great as Fullmetal Alchemist, but as a general audience I found the Art, All the BGM (if you noticed that the name "porno graffitti" appear in the opening of the Anime, trust me you can google the name safely haha, I tried it, trust me.), the way they present this anime, it is top-notch.
The story is pretty usual shounen style, A boy want to have power, no power? Never mind, the guys in your neighborhood happens to have the strongest ability, and pass it to you in a bizarre way. At least in Season 1, story is not this anime biggest strength. Oh, I forget he has a gay friend as well, arrogant and stupid at the same time.
When it comes to character development, I found it our main protagonist has a plausible character development. At the very least, he is not born with a nine tail beast (I am looking at Naruto) or someone with unexplained absurd ability on evasion and tackle girls (hello SAO). He become stronger and stronger throughout the story, in a way that make me almost believe becoming superheroes is possible.
But Boi, I enjoy this anime. It boils the blood inside me. It makes me wanna shout out: Go get it! As thought I am in the fighting scene. The fighting scene give me a feeling similar to Saitama, very enjoyable. The pacing, lighting, audio and art, everything whirl up to be an insanely satisfying tornado that leave me "Aweeeeeee".
If you are looking for some light, fun and action-packed anime, with a superior tempo, this is the anime for you. If you like Fullmetal Alchemist, Stein Gate, Saitama, Attack of Titan, I bet you will like this anime as well. At least there is something common in all these anime: it is a feast that you don't want to miss it.