All I can say about this series, is that the characters are very well thought out and do not strictly adhere to any cliche character type, and I love how the different characters interact with each other as the story unfolds. What's more is how Tanabe uses humour to great effect without losing the tension of the overall conflict in the story. The actual pacing of the storytelling has been very even and always gives enough information to move the plot but always leaves some suspense. Thought there is inevitably going to be a large conflict at some point, the story does a great job ofalmost making the main characters seem separate from the main plot, which really leaves you wondering how everything fits together (in a good way).
Overall, worth reading if you are into sci-fi shounen style things with less focus on action (there are still plenty of cool action scenes!), and great attention to details, I see no reason why you wouldn't enjoy this.

note:
The scanlation I read (it is not generally available in my country, and I'm poor) had some translation problems in some chapters, not a huge problem but it did require a bit of attention to make sense of some things.