Sleep is the forced vacation that determines our brain.
A bad dream is a consequence of the condition and the perception of life in which the lives you..
If you do not sleep at night, you will not be normal tomorrow.
Every device that allows you a "natural, normal sleep" is for your praise (whether it's placebo or really).
My hunting rating is 11 out of 10, only the one who does not sleep knows what a "good dream" is!