I stumbled on this last night - didn't notice the 'advanced' message - played it anyway.  I struggle with ADHD and insomnia - I'm 57 and really have issues with a foggy mind and falling asleep.   I was awake and watching the little markers - relaxed but not sleepy -  until it hit delta then I was just gone.  I woke up 2 hours later thinking "what just happened - did that ACTUALLY work?!"  I was able to fall back asleep and slept until my alarm went off in the morning.  
I'm amazed!  Thank you for these videos.  I will be using the beginner video for a while, however.  No need to body-slam my brain into sleep! ha!  
I'm excited to use the napping and recharging videos as well, as I have issues with drowsiness during my days. 
Awesome. :)
haha, excellent! Thanks for sharing! :)
Carla's Place