The plot advances in longer chapters of dialogue and paragraphs of description. These chapters are enjoyable and capture the reader's attention, despite Jenna's somewhat distant narration. The short chapters, generally of less than a page in duration, interspersed with the other, struck me as largely (ironic) pretentious, overdramatic and unnecessary. While the story overall does a good job of bringing ethical questions to the fore and making the reader think, these chapters hit the reader over the head with the issues. Pearson should have more faith in the reader's ability to figure some of the issues and questions out themselves.
Despite this weakness, I really did enjoy reading the book. It is quite short and likely exciting enough to hold the attention of reluctant readers. Dystopia readers will want to check this out, as will folks with an interest in ethical questions.