I was diagnosed with severe obstructive sleep apnea about 5 years ago. I used the CPAP as much as I could. I could not find masks to fit right, and the whole apparatus interrupted my sleep pattern. I could never get more than 2-3 hours of sleep before waking and then unable to get back to sleep. I woke up exhausted, frustrated, and sometimes angry every morning because I knew I would have to use the CPAP for the rest of my life. I searched everywhere for any alternative to using the CPAP machine. I heard and advertisement from Dr. Burns' office about the oral appliance for sleep apnea. I have been using it over 6 months and could not be happier. It is comfortable and I sleep soundly throughout the night in a deep sleep. I wake up refreshed and with energy for the day. I would recommend it to anyone who is unable or unwilling to use their CPAP machine.