I too had no idea so many effected and the the potential health consequences were so dire.
I started with a nasal pillow but ended up opening my mouth during sleep and defeating the purpose. Now a all full face and much better. I use the high humidity settings. Everyone is totally different with this stuff.
Jack Rainey - Full disclosure...reformed integrator, now mid-Atlantic manufacturers rep for: Integra, Paradigm, Anthem, Parasound, Atlona, LG TV's and Metra Home Theater...among others