Ok, so, straight to the point then...
If you're going to be shallow and base everything on how it looks, this manga is not for you. AT ALL. The art isn't anything to look at... It's not in the least bit pretty. But to be perfectly honest, it suits the story. It's portraying the darker traits of people and is very much a psychological manga about cheats, liars, and power hungry schemers all duking it out against each other with a huge amount of debt hanging over their heads --hardly a pretty tale full of singing and joy and bishies and if that's what you're after I suggest you walk away. Now.
Oh, and if you're after blood and guts or lots of action. Walk away.
If you're after something exciting and suspenseful that has you stopping to think about whats going on and reveling at how clever some of the points were (especially when you haven't thought of them yet), then stay right where you are! This is right up your alley, my friend.
Yes, after 90 chapters there are a few repetitions.The scenarios all have a bit in common, but when you consider that it's a game, the rounds are all going to be similar to some degree. Afterall, what game changes so much that there's nothing each level has in common? None, I tell you.
The explanations get tedious, but only if you read the chapters back to back in one go. You have to remember that this is a serialized series, so to keep readers from being confused or forgetting what happened the repetitiveness is necessary to a certain degree. I will admit that the line has been crossed a bit here and there, but nothing to fuss over extensively.
As for the characters; Nao makes mistakes that she should really learn from, but makes again anyway. But she's a sweet girl and despite her naivety and gullibility, she really is an intelligent person when she needs to be. Akiyama continues to always a have a near flawless plan for victory, but he does have some weaknesses. Fukunaga seems to sway from ally to enemy at every blink of the eye. They're all good, likable characters with their own faults and quirks, just like rest of us.
I couldn't put it down when reading it and if this sounds like something you'd like, then I can almost guarantee you'll be the same.