I have had my machine since Dec. of 1997. I have not slept a night without it since because the rewards are way to great. Before using my machine I had chest pains so bad that I would have to pull off the road while driving and wait for the pain to go away. I had many other symptoms, and everything went away after using my machine regularly. My first setting was 7.5 and a few years ago my wife told me that I was snoring while using my machine. It is amazing how long it took me to check this out. I then was diagnosed with A-Fib. After about 3 years of dealing with that, I decided that I needed to check on a different machine. My heart doctor prescribed an auto machine. He now has me at 13.8 lbs. of pressure, and I have been in sinus rhythm for 4 months now. I have just one great big issue. I love my nose Nuance Pro mask, but I can't keep from leaking air through my mouth even while wearing a chin strap. I would switch to a full mask, but my events go from 1.5 to 5 events per hour with the nose Nuance Pro, to 27 when I sleep with a full mask. I have made all kinds of thing to stop the mouth leak, but I have to say that I am out of ideas. I will never sleep without my machine, but I need to get my air leak/events per hour issues solved. By the way, I feel so lucky that I am in sinus rhythm now, and I really don't know if my new machine plays any part in that. I know it did not hurt.
