My dad was diagnosed with really severe sleep apnea about 6 years ago, he was waking up something like 40 times an hour to breathe. He snored my entire life until that point, to the point where it drowned out any other noises in the house. Toward the end of it, he would doze off while sitting in traffic, watching playoff hockey/football games--he just couldn't stay awake, he was completely exhausted every minute of the day. Then he got the cpap machine, and he's a completely different person now. He sleeps through the night, every night, with no problems at all. He raves about his cpap.
He doesn't wear the normal mask, he has the nose pillow thing, but his doesn't have a chin strap, it has a bite guard thing on it (which is perfect, as he also grits his teeth, and the bite guard prevents the gritting at night). I don't know if this is the exact one, but it looks like it.
http://www.cpapsupplyusa.com/CPAPPRO...qlRxoCkj7w_wcB
It did take him a while to get used to it, but he can't sleep
without it now.