There are no user reviews on IMDb, but there are a few critic reviews. Some of these are thinking of the movie as a "Skinamax" movie (softcore porn) and are disappointed that it is not. There are two serious reviews in German that understand its merits. Of these, one might profitably visit https://funkhundd.wordpress.com/2015/01/09/14-hofbauer-kongress-ich-schlafe-mit-meinem-morder-wolfgang-becker-deutschland-1970/
The movie does feature Véronique Vendell nude or mostly so, and she does have a remarkable hourglass figure. She capably plays the mistress of the "protagonist" (?), Harald Leipnitz, a hunk whose hunkiness and (we are told) bedroom capability is valued by his rich wife (Ruth-Maria Kubitschek). He wants her money or more of it and he's tired of being under her thumb, wanted only for his body, and so he hatches a scheme to do away with her. Vendell is crucial to his plan. Neither Leipnitz nor Vendell are depicted as evil or even bad people. They are not vice-prone, they don't have dirty mouths, and they don't mistreat the help. Leipnitz is simply fed up and very confident that he can bring this off, and Vendell wants him so much and is so easily handled (browbeaten and soft-soaped) by Leipnitz that she goes along. How do they know that two burglars will accidentally upset their plan? This results in a series of improvisations that the ever-confident Leipnitz manages.
The atmosphere of the movie is heated and chaotic. The principals are all sly and manipulative, each hatching their own schemes. They are immersed in sets of gaudy objects of tasteless accumulation. There is a certain humor to Leipnitz's increasingly imaginative actions and reactions as his initial plans require substantial modification. The direction is caustic.