I've been wearing one at night for about 7-8 years. Before I got it I snored so horribly that I never really slept well. I could sleep 2 hours, 8 hours, or 16 hours and still feel just as tired. I was falling asleep in church, while driving, and finally in the middle of conversations. It was horrible. Took me awhile to get used to the mask but once I did I couldn't believe the difference. I'll never forget waking up one morning about 15 minutes before the alarm went off and thinking, "man I'm not tired!" It was a great feeling. I went from not being able to stay awake to getting 6-7 hours asleep at night and feeling well rested! If it's sleep apnea you won't believe the change a mask makes.
I've had one for about 6 years. You'll get to where you don't want to sleep without it. I even rigged up a system with an inverter, a deep cycle battery and a charger so I can use it in our hunting cabin, since it doesn't have electricity without a generator. The rest of the guys can get a good night's sleep when I use it, because my snoring won't keep them awake.
You'll get the best sleep you've had in years.
My daughter works for Fisher & Paykel, they make the CPAP masks. Works great from what I hear, and since I have Restless Legs Syndrome, man, can I relate to what real sleep is like compared to the "before" version. I take a pill (Requip) to solve my problem, but if it meant lying in bed with a mask to get a good night's sleep, I'd do it in a heartbeat.