I liked this flick quite a bit, even though Cage is not one of my favorite actors.
I also liked the look of the aliens. If they had appeared on Earth in ancient times they might have been considered "angels". They match descriptions in biblical texts (beings of light, fearsome countenance, wings, etc), & the "drop-ship" roughly matches the description of the "wheel" in the sky from the book of Ezekiel.
ABSOLUTELY not trying to wax religious. I just thought the film-makers might have been going for a: "these beings have been visiting Earth for thousands of years" type thing.
Anyway: :thumbsup