Although this is the US cover, and I have the UK covers, I still think it's amazing. I love it in series when the cover art matches; when there is a constant theme you can see throughout. I love the use of colours throughout, and I especially love how you can look back at the cover after finishing the book and seeing how it relates to the story. However, I think my favourite part of these covers are the little taglines across the top:
"One choice can transform you."
"One choice can destroy you."
"One choice will define you."
I love how she has changed the last one to "will", signifying that this is the end for the series and for Tris. After seeing this, I am even more excited for it to be released! I am sure it is going to blow me away! If you haven't read this series yet, go and add it to your TBR pile immediately - you do not want to miss this.