While technically the movie is well made, the story is lacking in every corner. From it's 86 minute runtime you can easily subtract another 20 minutes, a little more than 10 of those were used for a montage to show that her campus is indeed empty and the rest splits for the title sequence and credits.... So, what happens in that hour that is left? A bit of cat and mouse play and what ever you've seen in other movies before.
It's just mediocore at best and fails to build up any tension. Instead of watching this you might check out You're Next or The Den which share some ideas but work better.