"Deranged belongs alongside other cult black comic horror curios like Motel Hell and two films namechecked in Arrow's publicity blurb, Carnival of Souls and The Honeymoon Killers. The viewer is constantly surprised by jarring turns of tone and sharp juxtapositions of wild humour with tough, uncompromising imagery. While some ideas work better than others, at least this film has them in abundance; with many low budget films from the 60s and 70s, necessity really was the mother of invention, and mavericks with talent and an eye for horror's sense of wonder could let their imaginations rip. The final sequence lingers long in the memory and delivers the enduring image from the Ed Gein case. According to the blurb, "…this is one of American horror cinema's great one-offs, an eerie, genuinely unsettling but also darkly comic experience," and this reviewer can't disagree with that." - John Costello, This is Horror