DH's CPAP machine changed his life. I hd been telling him for years he had it, but you know what DH's can be like. Then he had a microsleep when driving. To his credit, he saw the GP immediately, when tested he breathing was at the extreme end of the scale.
Once he had his CPAP, after years of getting up at 9.00pm and constantly napping all day, he was up at 7.00am and awake all day. Cramped my style a bit, those mornings between 7.00 and 9.00am had become my 'me' time!