I think that Meg over at Cuddlebuggery summed up my feelings about Allegiant so well that I can't possibly top it, so go read that, then come back here. 
 Despite the generally negative, very logical breakdown Meg provides, Allegiant connected with me emotionally. I felt much better about the book than I think about it, which is weird and I can't exactly explain it. Immediately after reading it, I hit the 5 stars button, then after about a day I turned it down to 3. I am a bit frustrated with the logical inconsistencies and the ways in which everything we believed about the factions and the city turned out to be completely meaningless, but I still very much liked the experience of reading it.