Agree with the above, and as an old fart that was around when it came out in 74' the hoopla was intense (long before 'video nasties') one U.S. network cited it as a sick indictment of modern America, as I recall what really caused offense was the guy in the wheelchair getting 'buzzed' so along with The Exorcist the moral guardians were weeping by the mid 70s, I of course as a teen horror fan was delighted...
(that was until living in the U.K. 1984 came along and they all got banned
)
Maybe I would say that it takes too long for them to get to the house in modern terms but it is an absolutely must watch for horror fans, just so iconic.