Not always covered by insurance and it only works about half the time. but it did work for carol. >> it's changed my life. i am sleeping better, and i feel good. i feel more rested. >> wow. 30 million americans have sleep apnea. >> imagine if half of those have partners, imagine how many millions of people in this country are -- >> not a good night's sleep. i'm guilty of snoring myself. the machines aren't exactly -- don't set the romantic mood. you have to do what you have to do. >> depends on whether you want sleep or something else. >> excellent point. you know what i mean? something that c...