I watched it this afternoon as my wife had several friends who recommended it.
I found it to be a bit slow moving, and didn't like the way it was filmed with the past and present happening at the same time.
There were so many unanswered questions. What caused it? Why could birds sense them? Why do we never see any even though we see the evidence of them chasing the people? Why do they not kill people? Why does it not effect everyone the same way?
I did enjoy the acting and was impressed by the list of very successful actors that were in it. I think it was a little bit of a RIP off of The Quiet Place.
I wouldn't watch it again.