Worth the read if you're fine with ultraviolence. The banter is sharp and snarky (the girl keeps accusing MC of being chuni), and the the art, while a bit on the sketchy side, is good. The mangaka is not afraid of drawing nipples, so there's plenty of fanservice, too.
I wouldn't go as far as to say you can turn you brain off, though, because there's quite a bit of talk about stats, skills, and leveling up. It seems like the world building is pretty well done so far.
The only real qualm I have about this is that it looks like the entire focus of the story is going to be just getting out of the dungeon, but I'm not 100% sure about that.