Four days over the past month, I ripped the mask off my face in my sleep with less than 4 hours of use.
After going to bed Thursday night, I slept 9.2 hours, but was still groggy and tired at work.
After going to bed Friday night, I slept 10.7 hours, and had a 3.2 hour nap, but was still tired.
After going to bed Saturday night, I slept 11.2 hours, and was still tired.
At this rate, I will be sleeping 24/7.