Horrible. First, the way, the movie is filmed. I hate those shaky things. I wish we could have just pretended that the glass wasnt moving at all. Made me dizzy.
Second, Sarah's character is just plain annoying. She should have been shot first and more people could have survived. Shes a deadweight, pushy, entitled, selfish and annoying right until the very end when she knows shes definitely infected but ofc in true Sarah fashion, she should be saved still. Nevermind, that shes definitely gonna turn and kill people when she does. She just needs saving.
Also, meh. Story was just uhh whatever. I stayed up because I already started watching this, and the first few parts were interesting but I wish I just cut it short and gotten some Zzzs instead.