Spoiler alert
I'll give it a 3 star since the acting is good and the atmosphere is great giving alien vibes. My problem is that they missed so many opportunities to make this film great! They could have exploited the hallucinations more, they could have shown Sam's thoughts after 3 years living there. Also him meeting his clone had zero impact. First Sam just get abandoned without an epic good bye, it just felt so meaningless. Plus new Sam had zero personality. But anyway I think the island executed the clone narrative much better.