The quality of products and services are in the end also the result how we as consumer treat those products and services. If food of high quality is degenerated for instance by our running-out-of-time hurry putting it in a magnetron, we don't get the best possible results! The same with bad maintenance of a car, not reading all the neccesary guideline`s for use of a refrigerator, or neglecting misuse in general. User guides are for reading! To get the quality intended!