Awesome film, with a but...
Day 89... wherever these things have come from they've decimated society in 3 months, and yet Beardy and his family have already figured out how to survive because a paper said the monsters hunt by sound. So how come government haven't lured these creatures to their death by using sound to trap them and kill them?! Whilst they are incredibly formidable and effective killing machines they're still vulnerable if they can have their heads blown off by a shotgun. Also reckon science bods would have quickly figured out the feedback at a certain frequency disorientates them...
Saying that, still a great movie and cleverly done.