I enjoyed The Death Cure more than The Scorch Trials and The Maze Runner. It was a lot more action packed and held my interest. The ending was good but I would have liked a bit more info, details and reunion interactions after the "ending". More time should have been spent showing all of the main characters (that survived) at the end. Some instrumental people just weren't mentioned as they should have been. 
 Spoilers ahead..... 
 Stop reading now if you don't want to know important details.... 
 Last chance... 
 Okay here we go... 
 I'm totally bummed that Newt wasn't immune. He was a good guy and I was really pulling for him. I'm glad Thomas did the right thing by killing Newt and ending his suffering. 
 The characters interpersonal relationships could have been written a lot better. A lot seems to have been skipped over, probably in the interest of time. Like with Brenda, I'm glad she ended up with Thomas but there really wasn't much to make me want to care about them together or feel strongly about her. 
 Teresa dying was predictable but quickly glossed over. I think the author lacks the ability to portray any amount of character depth when it comes to many of the characters and their feelings. 
 I was so glad that Thomas killed Rat Man with his bare hands. That was very satisfying. I would have wanted to choke the life out of him too! 
 My final thoughts are that too many things were left unanswered and not finalized. This book was good, action packed and I read it pretty much straight through, but it seems rushed due to the things left unsettled. 
 Not sure if I really care to read The Kill Order. Probably won't unless I get really bored and have nothing else to read. All in all, The Maze Runner series was good, not great. Overall I give the series (books 1-3) 3 stars. The Death Cure saved it.