I have both and I couldn't get used to the machine either. I even tried the bipap and it was a no go. I just gave the machines back and will deal with what happens.

My dad on the other hand has severe sleep apnea and since using his C-pap he has lost weight and is 1000% more rested. I wish I could have gotten used to my machine

Fingers crossed for you that you can get used to your machine.