To start off with ~ why did no one tell me that Ansell Elgort was in the film? What. A. Babe. If he asked me if I like dragons at the check out of a service station, my answer would be yes. ;)
But as all film adaptations of books are (perhaps with exception of Chronicals of Narnia and the Disney classics), this just didn't live up to my expectations. Sure the actors and actresses did a good job. It must be said that Cara D did a good job, but the scene where she was looking out of the car windows did kinda remind me of a perfume ad...
It just annoys me when directors take creative license and mess with the plot!
The most annoying change for me was when Margo was all like Oh Q I need your help for these 9 missions tonight but they only did 5 (maybe 6, I can't quite remember)! Your normal movie goer : ie. The dad that took his prepubescent daughter to the film, probably wouldn't notice this or be excited to see a seaworld breakin... But I, nor every other read of the John Green novel are not said Dad. Thus, the question must be asked: why not just say you are going to do 5 missions, why be inaccurate??
Secondly, the road trip to find MRS was quite boring, the well written scene where I thought they were going to die was just melodramatic, and the fact that his friends left him in the middle of some real-but-not-real town was totally unbelievable.
It has to be said that the movie did have an awesome sound track! Go humble St Kevin's boy Vance Joy being all internationally known and stuff.