The movie wasn't revolved around the aliens like all other movies, the Alien movies, the Predator, throughout the movies we learn more and more about the aliens, i repeat, "movies". This "movie" was about survival, and they just made it lol.
Im happy how this movie stepped aside from the "alien" standard in movies, the reason i think they didnt explain alot of things, well, spielberg, because unlike jurrasic park, where they already knew how the mosters would act, in this movie they didnt. All of the sudden a crud load of lightning strikes, the thing gets up and starts going maniacal. People running for their lives with you know what all over them
It was more of a suspense movie, we knew what they were but we had no idea what they were, the ending, well, i thought it was alright, i liked the blood farms they started to create, and how the humans got their chance because of the bacteria and viral entities in our air which we've survived from for a loooooooooooong time.
good movie, but yeah more in depth would be nice, perhaps the next one, if its to be.