I have used a CPAP for a few years now because of sleep apnaea. I did not find it hard to get used to, except for hearing my breathing through the machine. Before the CPAP I could not stay awake longer than 10 minutes watching TV in the evenings. The first day (after using the test machine the night before) I watched three hours without getting drowsy!! I find that I miss smelling the fresh air at night (when the windows are open) so sometimes I give myself a treat and don't use it. A night here and there is not so bad for you. Sleep apnaea can result in accidents, inability to concentrate at work and even serious heart problems so use the machine!!