I have sleep apnea for around 20 yrs. Have used capo n bipap machines. Now on an IVAPS machine. Definately helps my sleep. I take sleep meds along w this plus oxygen when I sleep, which was also discovered on the sleep test. I still wake up at times during the night but fall right back to sleep. I was also getting constant migraine headaches which stopped on capo therapy. Yes I still have insomnia issues but it's so much less. I would never not use my machine. When electricity is out I run it on a separate backup battery.