I can use nasal or pillows and do use an Eson with no chinstrap,,no problems. AHI runs under 1 most nights.
But I like a Simpus better. Or total face.
I seldom use the Simplus or the Fitlife though.
Reason? Simply cannot get nearly the results with ffm at any pressure.
AHI is gonna run 2 or 3 all the time with FFM.
I guess im just an oddball in wishing I could get the same treatment quality from ffm . But it dont happen for me.