I also have severe sleep apnea. Fortunately, I use the ResMed devices. The only thing wrong with them so far is an occasionall shortage and backorder of parts.
My first time with a Phillips machine...
Fortunately, the unit I replaced was still functional.
So I’m using my 6 year old ICON machine.
I bought the Phillips because of the low decibel level. My ICON is only 2 decibels louder.