Before my husband had his he would quit breathing hundreds of times an hour throughout the night. If he had just snored, it wouldn't have been a big deal, but with the stopped breathing he would thrash around and not start breathing again until he woke up a bit. Severe sleep deprivation is often the result. He feels much better now that he is using it.
And the bonus...I sleep with Darth Vader! ; )
Before or after the fire?
(If you haven't seen Episode III, ignore that question. ;)