This movie reminds me of The Shining, but set in a post-apocalyptic, zombie-infested world. Outside is more of a psychological horror drama, with themes like jealousy, growing insanity, and intergenerational domestic violence. I found this approach quite depressing, and it wasn't really for me. I usually enjoy easy-to-watch zombie splatter movies and prefer to avoid psychological tension, conflicts, and relationship issues between the living.

While zombies aren't the main focus here, the ones we do see are genuinely scary and convincingly portrayed as the terrifying undead. However, given that the movie is long and slow-paced, with most of it happening in a small, confined space, I would've liked a bit more action and some classic zombie-killing scenes. Alternatively, the movie could have been shorter without losing any of its impact.

The acting is solid, and everything looks visually impressive. I don't know what the budget was, but it never felt cheap. The storyline is coherent, though it leaves some key events up to the viewer's imagination. Overall, I have no complaints about the production quality - it's just that the heavy focus on psychological and domestic abuse themes didn't appeal to me.