I got mine in 2009 after a sleep study where I clocked in at 59 events per hour.
It worked perfectly from day one. I had forgotten that you dream when you sleep. I use it religiously; even when I travel.
The facemask straps leave marks on my face and back of my neck. They also have causes cowlicks and “wear spots” on occasion. I fixed that by wearing a skull cap
Check out post #25
I tolerated the strap marks for a good seal. Then I tried the Phillips Amera View. Can wear the mask much looser with a good seal once you get the hang of it. It’s frustrating that it cost so much to try different setups. Everybody’s face is different and fit is so important.