This is one of the least captivating movies I’ve watched in a long time. Plot is laughably predictable, comic relief is cringeworthy and whatever horror is just ... plain horrible.
It is great if you wanna play it in the background while doing something more entertaining, like washing the dishes. You won’t miss much.
If you are looking for a scare, the only thing that is going to spook you is the knowledge that you have suddenly aged 2.5 hours. You’ll probably feel like one of the “shamblers”, ie the brainless lower caste zombies, at the end of the movie... if u can last till the end that is.
If you are into mental torture, u can think of this as an ultramarathon for ur brain. Pat yourself on the back. You deserve a beer for finishing this movie!