My husband and I are both on CPAP and found we had to sleep on our backs in order to keep CPap masks anchored. I have found the pillow to be very helpful in that regard. My husband uses the pillow but feels it is too thick for him to be comfortable. I find he removes it and sleeps on his old pillow at times. Although I also feel the pillow is too thick (I have neck problems), I really cannot complain. So, I am happy; he is not. I am sleeping better!