Watched Bird Box last night. I can see why the buzz around this movie exists.
Here's my no spoiler review:
Great psychological horror movie. It definitely keeps you at attention and on the edge of your seat without jump scares (at least the first half - the second half drags a bit). Casting and acting is good, although I thought the Sandra Bullock character could have been better played by someone else (but then again, I'm not a Bullock fan). Unfortunately, there are several really bad plot holes that detract from the movie. And the ending, while not horrible, is not really satisfactory (and is actually a bit silly when you think about it).
I will give this away: there's no answers to any of the questions that are raised in the movie. If you are the kind of person that expects some resolution, you might want to take a pass.