Tokyo Ghoul is one hell of a disappointing adaptation and thus fits in perfectly in the season... Who ever did the planning on this failed miserably leaving the anime rather flawed.
Without having read the manga we apparently get like 70+ chapters in just 12 episodes but it isn't just that - the arcs are not in order. As a result the characterizations are suffering and I can't say the story had a good flow. They pretty much picked out the action and went with that. Only in the last episode we got to see some of the inner workings but it's not like that cleared anything up. Just like the manga this week the anime ended on a cliffhanger although that is still better than trying to do an original end. The story seems to have some interesting ideas but with the manga now having no clear outcome either you can't even say "read the manga"...
Production wise the show was alright although suffering from ever present censorship of the gore or even leaving out certain mutilations.
With the uncertain future of TG's story I would not recommend checking it out.