▁North ▁American ▁DVD ▁release ▁occurred ▁in ▁ 2 0 0 9 . ▁ ▁Re ception ▁ ▁The ▁review ▁aggreg ator ▁website ▁Rotten ▁Tomatoes ▁reports ▁an ▁ 8 9 % ▁appro val ▁rating ▁based ▁on ▁ 3 7 ▁reviews , ▁with ▁an ▁average ▁rating ▁of ▁ 7 . 5 2 / 1 0 . ▁The ▁site ' s ▁cons ensus ▁states : ▁" Pl ung ing ▁view ers ▁into ▁the ▁night mar ish ▁h ells cape ▁of ▁an ▁a partment ▁complex ▁under ▁sie ge , ▁[ Rec ] ▁proves ▁that ▁found ▁foot age ▁can ▁still ▁be ▁used ▁as ▁an ▁effective ▁delivery ▁mechanism ▁for ▁sparse , ▁economic ▁horror ." ▁ ▁Review ing ▁the ▁film ▁for ▁the ▁BBC , ▁Jam ie ▁Russell ▁called ▁it ▁" A ▁run away ▁roll er co aster ▁of ▁a ▁fright ▁f lick ", ▁pra ising ▁the ▁" f aux - doc u ▁hand h eld ▁style ", ▁and ▁the ▁sense ▁of ▁cla ust roph ob ia ▁and ▁confusion , ▁claim ing ▁that ▁"[ Rec ] ▁will ▁definitely ▁j angle ▁the ▁n erves "; ▁however , ▁Russell ▁critic ised ▁the ▁lack ▁of ▁subst ance ▁and ▁a ▁" one - dimensional " ▁supporting ▁cast . ▁Blo ody ▁Dis g ust ing ▁awarded ▁the ▁film ▁four - and - a - half ▁stars ▁out ▁of ▁five , ▁with ▁the ▁rev iewer ▁writing , ▁"[ RE C ] ▁has ▁it ▁all ▁and ▁is ▁probably ▁one ▁of ▁the ▁best ▁Spanish ▁horror ▁films ▁in ▁recent ▁memory ." ▁Blo ody ▁Dis g ust ing ▁later ▁ranked ▁the ▁film