Burnt Offerings came along with other late 70s slow burn creepers like The Hearse and The Changeling. It has the slimmest of plots being like an early blueprint for The Shining. It crawls along at a snail's pace with very little happening besides episodic slices of marital strain under the guise of the evil house that possesses and ultimately eats people. Filmed through pantihose, this is one of those hazy deals that must have been created to provide a surreal, dreamlike effect but I dunno.... Bette is sort of wasted, Oliver makes it a vanity project and comes through exceedingly well and Karen is of course superb and losing her mind. Your patience will reward you make no mistake, as it is the last third of this movie where it really swings into top gear and will get under your skin. Slow burn indeed. Oh and last but not least, that smiley chauffeur....