The humidified air in then forced into my airway, keeping it open, and thereby knocking out most of my apneas, but eliminating all of my snoring. Well, I wouldn't necessarily call the force or volume of air pumped into your nose comfortable. By the same token, I also wouldn't say they are uncomfortable. Without compliant use, the benefits of the PAP machine will never be realized, but you will also never become comfortable using the interface or mask that is prescribed for you. The most common questions and complaints that I've seen about PAP machines involve the interface.
Many people have problems getting used to wearing the mask while sleeping.
Others wake up to find that they removed their mask during the course of the night. Still others experience the joy of awakening as they rip the mask from their face and toss it across the room. Once I got used to the machine and the mask, including the once-odd sensation of air being forced into my nose, I began sleeping soundly, peacefully, and feeling rested. In fact, a lot of my daytime sleepiness disappeared, though not all of it. I still take frequent naps, but that's another discussion.