Mask question

I currently use a full face mask but I don't always breath through my mouth while sleeping. I just find a full face mask more comfortable than a nasal mask. Will the treatment still be as effective using a full face mask if I do not mouth breath?

Yes.

FF masks make a closed pressure circuit that includes both nasal and mouth air openings.

You still need to control leaks of the mask seal ... but whether you breathe through your mouth or not will make no difference on effectiveness of the treatment. Actually by NOT breathing through your mouth you won't have to deal with other side effect issues like dry mouth.

For the same reasons DS says, I did not consider anything else. I find a FF to be comfortable, really don't understand
the nasal pillow thing.

Which FF are you using?

A FF mask that doesn't leak is the better treatment, because it takes the chance of mouthleaking out of the equation. One less thing to effect your treatment. Jim