I was never diagnosed with sleep apnea but I had an O2 saturation alert when I would sleep side sleeper so I bought a cervical pillow and found a quiet CPAP machine. I add saline and a few drops of very diluted I+KI to the water just to keep anything from growing in it despite changing it daily. I love it. My sleep has never been better. I often forget I have the little nose mask thing. The cervical pillow is awesome, never goes flat. My biggest improvements were from that little cervical pillow.