I have been on a machine for about 10 years. My DH said I would stop breathing several times and he couldn't sleep for worrying about me. I had no trouble sleeping. LOL So I was tested and have been on a CPap ever since. Just recently I had to go from one on the nose to what they call a full face one. Don't like it but I also don't like the alternative, so I use it every night all night. The full face is not all that comfortable and sometime it lets air escape and that wakes me up. Am talking with my distributor to see if something can be done about that.