Minor spoilers may be found.
This book took me until about halfway through to really get in to. First off, it was really difficult remember important points from the previous books since it's been since June or July since I read the first two. It would have been nice to have a few more clues as to characters or situations from the other books because just small mentions were enough to make me feel like I was missing something important but didn't want to take the time to rifle through Matched or Crossed to figure out what it was.
This was also the first book in the trilogy where I started having trouble keeping track of POVs as other reviewers have mentioned. The characters seemed to have the exactly same view of the world and way of thinking in general.
HOWEVER, as soon as I really got into the search for the cure I couldn't put Reached down. My heart ached for Xander and for Cassia as well.
I'm a little skeptical about the fact that it seemed as though every person ever mentioned ended up getting to know one another or somehow being involved in really really important ways in the plot. Xander, Cassia, and Ky all were taken notice of by the Pilot in different ways. You're telling me there was no one else in all of Society with similar traits to any one of them? And while Nea Lei's surprise at the end was a beautiful twist, it was in my opinion a stretch and just a way to tie up what wasn't really even a loose end with Vick.
I do love Condie's writing style. The imagery is beautiful and every sentence and thought is poetry in itself. This was a conclusive and satisfying end to a great series.