Spoiler - the neck?
When I saw them putting the chips in the people, I was like ... back of the neck, why? Then I figured must graft to the bone. Didn't know it was a sliver under the skin.
That said, I found the lead actress very competent. There have been too many Twilightish actors and actresses. Pretty lady too. Kristen Stewart always had a lopsided face. (Never made it all the way through any of the Twilight movies, but saw Snow White)