Confusing
Would have been better as a roger corman monster film. SPOILERS
Stellar intro and score when she gains consciousness (perhaps five minutes worth of blade runner-level cinematography and screenplay here) with genuine quality and entertainment up until the end of the first act (arm chop) despite the contrited feel of the military transport scene. It then proceeds to nosedive into benign exposition and juxtapositional plot points that borrows from several films outright at impressive speed.
Not sure how to understand the twist as it's called. Since Eve can safely be considered the antagonist of the end of the film, it isn't clear with all the hallucinating just what she is. Was she stuck in a loop? Was she an alien who escaped? What did she see in the (Adam) body bag? As impressive as it started; and what covert psycho-ops/analysis of its premise it did dabble in, it's equally impressive at how convoluted and amateur it became by the third act.
One thing is for certain: the art direction on the film poster/box art is utterly amazing and usually reserved for those epic films you buy over and over in changing formats.