These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Family Plot
Adaptation Displacement: The film is loosely based on The Rainbird Pattern (1972), a thriller novel by Victor Canning. Due to its connection with Hitchckock, it is now better remembered than the novel.
Special Effect Failure: The bluescreen work in the driving scenes is exceptionally poor, even for the time. You can often see streetlights through the actors.