Great watch, will watch again, and do recommend.
This really is a "what if" they extended the scenes from "Hollow Man" where Kevin Bacon gets into the public and starts messing with people.
I am starting to worry about Elisabeth Moss though, she seems to be type-casting into all these heavy handed dramatic roles, or maybe that's just how she acts. She's certainly good enough to pull it off, so it's not a downside of the movie, it's just part of a note that this movie is very much a slow-burn suspense. On the premise alone, the first 2 acts are going to be that way as it is established that she is / isn't crazy and there is an invisible man stalking and sabotaging her.
My biggest problem with the movie is that there has never been a more plausible and clearly reasoned explanation for the events, to include camera footage and dead bodies, than she has in this story. If someone finalized a version of a wearable inviso-suit, then this is exactly the type of nonsense they're going to get up to, especially if no one knows about it.
It is a little irritating how they handle him once he's been exposed as well. Mostly it's because of the premise that no one believes her, but you'd think people had seen a ghost movie, or would have a clever idea.
If the movie sounds good to you at all, then I really think you'll enjoy it.