I went in to Sweet Country completely blind, had no idea what it was about, knew literally nothing beyond Sam Neill being in it, and the fact that it was called "Sweet Country" (good thing too, 'cause the trailer I watched for it a week later spoils literally the most important and final plot point).
Sweet Country is a slow-burn venture in the right way, that makes some odd stylistic choices which perhaps would have better served a different sort of movie. A distinctive film for a year that has had a lot of same-same movies.
Final rating:★★★½ - I really liked it. Would strongly recommend you give it your time.