I have pretty severe sleep apnea and I was told I'd need a CPAP machine to be able to get a good night's rest. But I hated my machine, it was cumbersome and I still woke up throughout the night. So then I started researching alternative methods and came across PureSleep. Honestly taking the risk on this mouthpiece was the BEST decision of my life! I haven't slept so soundly in years, even my husband noticed a HUGE difference! I'm ACTUALLY sleeping through the night! Don't wait, if you have OSA (obstructive sleep apnea) take the risk and get this device. The instructions are easy to understand and it just takes minutes to situate! As an RRT I'm constantly sharing my experience with PureSleep to my patients with OSA!