Watched this last night. WARNING: POTENTIAL SPOILERS
Had the same feelings I had at the end of Signs in terms of closure surrounding the big bad... what it was, how people continue with their lives in this new reality etc. IMHO this would work nicely as a prequel to something that delves deeper into what these things are... or even as the pilot to something bigger. Are they demons? Aliens? Extradimensional beings? from the Warp? I know it is intentionally unclear, but in the context of the next point, I think they should have gone further than they did
They didn't handle the suspense very well and my wife got fed up with my comments turning out to be right 5 minutes later. Plot-wise it was very predictable if you're a fan of the genre.
Acting was very good and I think they did what they could with the script.
My view: the marketing behind this was ridiculous leading to many people watching it and ending up like many of us posting now. Apart from the promotion on Netflix itself, I was bombarded online and even on sites with people (no doubt paid by Netflix or bots) punting it as the next cult classic must-see, memes on facebook about how people were gonna name their kids Boy and Girl (spoiler alert: when you have a boy and girl they are called this anyway :roflol: ).
The Rotten Tomatoes score of 62 is probably accurate. It really was more like 50% for me. Netflix has some really good stuff that I've enjoyed series wise (eg: Stranger Things and to a lesser degree Haunting of Hill House), but the movies have been a bit hit and miss.