This manga is quite interesting. At many points it would seem dull and boring, however, you can't help but keep reading because of the charcaters, not because of the skills and the rules of the world, but simply the psyche of each character and how Medaka improves others. I know it's cliche but thats the exact point of the manga, in some ways what the character is doing is telling you, that you no longer need to rely on the manga itself to give you happiness, in many cases it makes fun of Shonen Jump stories despite being one itself.
In many ways it does fail to an english audience, mostly because of the script of letters for puzzles in many cases, it can be hard to grasp what is happening and what rules matter. And so I've skipped those kinda battles by skimming through it, because ultimately it was a battle of ideas and not of the actual fight.
Edit: So now that I totally finished it, I'm disapointed that it did the exact same thing they do in a lot of these ending mangas, show the charcters will end up together, but just not how. It's very annoying not having good endings especially if it contradicts how the story progresses. FOR EXAMPLE, telling the audience something will happen, or a change of tone, and then nothing happens, and the author forgot wth he was writing lol.
Tldr: Weird but engaging in a fun and different way: 8/10