I have mixed impressions of Speed Grapher.

There is a theme of superheroes, or rather mostly supervillains killing each other using supernatural powers. I found it mostly bizzare and unnecessary. The spectacle is average. The mechanism of the powers isn't particularly inventive. The powers of the main hero turned out to be the most interesting compared to all the others in the show.

Every character has a heavy, tradic and realistic backstory. With characters like that, I expected more scheming, shifting alliances and policical maneuvering, than there was.

There is a little social commentary.

Speed Grapher features a difficult journey of battered characters. Simple plot and bizzare themes are elevated by emotional connection to individual characters. Try watching this show if you like heavy topics and adult characters.