Fascinating, surreal horror
I hadn't seen this for a good 15-20 years - and it's as weird and surreal as I remember. Not least due to the dreamlike score (by prog-rockers Goblin) which lurks in the background, in a similar way to Mike Oldfield's Tubular Bells in The Exorcist. Visually it's gorgeous, with those blocks of blue, green, and - especially - red, that Argento loves so much (the hallways almost look like Mark Rothko paintings).
Some of the deaths really impress; the friend of the girl near the beginning who gets impaled when the skylight falls in, the girl near the end who falls into a pit of razor wire, and - my favourite - the blind guy getting his throat torn out... by his own guide dog! The remake dragged at times (it's exactly an hour longer) and didn't always hold my attention. No problem like that with this. I can't say it's great (some of the lip-syncing/dubbing is distractingly off, like a spaghetti western, and one or two of the performances are a bit hammy), but it's a really fascinating watch. 7/10