"Its mythology and character beats may be thinly drawn, but it doesn’t detract from the propulsive action sequences or gory moments. Expósito demonstrates her horror mettle as heroine (...) Rating: ★★★½ (out of 5)" 

"Impressive effects can't make up for tediously familiar cosmic horror. (...) While not necessarily a bad movie, it feels like it could have been so much more (...) Unfortunately, it just feels like a retread of other things we have seen before" 

"A thrilling and highly enjoyable horror film (...) Through his images, from his narrative and aesthetic approach, Balagueró manages to reflect the beauty that lies in the darkness" 

A highly enjoyable film with horror, crime, buckets of blood (have I mentioned how much blood there is?!?), awesome crafty old ladies, a cute kid, and a kick-ass heroine.