I'm muy experience with a Reamed one, on one hand, the noise. It took a lot of time for me to get used to it and fall asleep. I did some adjustments to the machine using the hidden medical menu to improve it (basically, disabled "Expiratory pressure relief (EPR)™" which "maintains regular airflow pressure while you inhale and reduces pressure to make it easier when exhaling")

On the other hand, the masks. I started with moderate success with a nasal pillows one and at some point I started opening my mouth having the worst dry mouth experiences in life.

Then I switch to a full face mask that covered my nose and it itched so hard at night that I woke up just to scratch.

Then I switched to another full face one that left my nose out, but couldn't get it to not leak (I have a lot of facial hair).

Then I got back to the nasal pillows one but I'm taping my mouth close. I've finally had moderate success with this.

I took me like 3 years to get here.