This was the best movie in its particular genre* we've seen in years. The trailer gives way too much away, unfortunately, but it's still a fantastic ride. The script is excellent, the acting and comedic timing is top notch, and the lore/world building is genuinely fascinating. The antagonist(s) are terrifying, but more importantly, they're fun as hell to watch.
Can't recommend it enough. Try your best to go in blind!
*Not saying what genre in the unlikely event you've managed to avoid seeing the trailer