Thank everyone for the replies. I was having a difficult time getting use to wearing the mask. I did talk to the rep and she ordered a full face mask because I wake up when I breathe through my mouth. My dog use to wake me up when I stopped breathing at night. Hal my dog still does when I breathe through my mouth and stop breathing, hence the full mask. I feel so much better since I have been reading these replies. I know the rep said I will always need the machine so I better adjust.