This is 100%. I've been using mine close to a decade not only mask size but seal type. My wife can only use the foam rubber type masks I use the regular ones. I also have a Resmed Airsense with the heated hose and it really helps.

It took me a few weeks to truly get comfortable but now I can't imagine life without it. Never thought there would be a time when I could get 6-7 hours sleep and I would be fully rested.