I don't have much of an exciting story, but have been using CPAP for about 5 years.
I developed sleep apnea shortly after going on TRT. It was pretty clear what was going on since I was experiencing some very obvious text book signs and symptoms, but needed a sleep study to confirm/get my insurance to pay for treatment.
Had an in home sleep study which revealed moderate sleep apnea, and began treatment with CPAP. Definitely an adjustment period getting used to the masks, I really hated it at first. Things got easier after ~6 weeks, and it's been a match made in heaven ever since. I love my CPAP machine now, such a game changer.
I dislike how silly it looks, certainly takes some of the "sexy" out of the bedroom, but thankfully my wife is a very tolerant person.