This story would have worked better as a Star Trek or Twilight Zone episode, and not just because it could have been told in half the time. It's fine if you enjoy the slow tension of a mystery and some clever--but predictable--plot reveals.
The acting good enough, though some lines were more recited than acted. One character came across as too strange to be believed, and I thought that was just bad acting until much later in the movie.
The people seemed normal. The setting and visuals seemed normal. It could have passed for an episode of a sitcom if not for the creepy strangers and confusing events. I found the constant background music to be distracting.