Airsense 11 and n30i mask. I left all the settings where intact, did the 'test flight' and the mask sealed nicely. The little nasal pillow have to be just right but then the pressure seems to hold them in place, so very little tightness needed in the mask.
First few minutes were hard. I couldn't get enough air, it was too strange, etc. I had a panicky feeling. But I tried to 'relax into it' and pretty quickly settled down.
I had stayed up late intentionally so that I was tired and ready to sleep. Sure enough I fell asleep. During the night, I turned from side to side a few times and it was easy to adjust the pillows/straps very slightly to keep them in place. No worries.
At one point, I got up to use the bathroom. When I got back, I reconnected but I couldn't settle into it again. I wanted to take a nice big breath but if I opened my mouth, the air shooting out made that 'big breath' super weird and unsatisfying. Then I started to realize I was getting congested, which I had noticed before I went to bed. I had blow my nose and felt a little stuffed up but just a little, and it was a bit worse.
So, I bailed out. I thought it had been about 2 hours. In the morning, I checked the app and saw the below data, which I think isn't bad for first night!

I am thinking to try a full mask, the kind that has nasal cushions on top, just to see how it would feel. Still, encouraging start. I did 5 hours first night.