for more than a year and a half I have been cycling through sleep aids trying to find something to help me sleep after surviving a traumatic incident. Not just go into a zombie state but reach DEEP sleep. I sleep with a sleep monitor and I wasn’t registering more than 10 minutes in deep sleep. Not good. I was skeptical – but figured 4.99 was cheaper than another prescription I’d throw away, so I gave it a go. First night. FOUR HOURS SOLID – WONDERFUL – REFRESHING sleep. I was ready to hit the ground running! I am so pleased with my results – I use it with my kids and they too, benefit from it. I tell my friends about it, my family… if I can quit medication for sleep and relax my way to sleep… sign me up! Headphones are most beneficial for this recording to have the BEST effect but not critical. You won’t be disappointed!