Over the years, I have had two separate sleep studies. Both were absolutely horrible experiences. I have insomnia anyway -- since childhood -- so that equipment simply made it horrible. I was freaking out. I think about 4:30 AM on the last one, they broght me some ambien, so I may have dosed a little bit between 5:00 and 5:30 AM, at which time they annoucned the study was over. Both studies said "severe sleep apnea". Of course, I don't know how they could diagnose that on about 30 minutes of sleep. Anyway, on both occasions I tried hard to use a CPAP for weeks. Those were about the worse 4 months or so of my life. Conclusion: If you want me to sleep any, I do not use the machine. If you want me to use the machine, I will get far, far less sleep than using it. I just cannot imagine how anyone can tolerate them? I have tried various masks including the little nose pillows. I find a comfortable spot and I feel air blowing in my eyes, which causes me so much anxiety. I was shamed -- terribly shamed -- by providers when I would tell them that I just cannot do it. Every single proivder now asks me about it and feel like they need to read me the riot act about what may happen if I don't use it. Nobody understands the situation -- nor do they try. Yes, I am extremely tired many days, but less tired than trying the machine and getting so worked up about it every night. And, they wanted me to take it when I travel ?!?! Nope, not going to happen. Ever. My memories of wearing the mask -- "I cannot wait to get this thing off so I can get a little bit of sleep". Frustrated as can be here.