Pretty poor, if this was at my local church theatre with Barbara from the butchers and Ted from accounts it would have been tolerable. Regurgitated lines, not scary at all, poor nonexistent story, predictable and unbelievable twist. Making loud noises and flashing lights makes you jump, but it would if no one was on stage. So if you want to get the equivalent experience get a few friends round talk rubbish for two hours and ever now a then get someone to scream randomly, job done. Biggest question is how has this had such a long run ?