I am using this because I feel mentally sluggish after sleeping a good 8 hours and I know I will sleep most of the day away.  My brain started thinking about pancakes and caffeine drinks, I turned on a video but the words were drifting away. My eyes start to pop open almost immediately, the tone in my right ear gets so loud that I can't possibly sleep at 200 Hz.  My body is a little weak but I sit up and I am there. This the second time I've tried this.
Keep the volume low, I don't want you to make yourself deaf with this :)
lau May