I've been on CPAP for nearly 9 yrs now and it's been extremely helpful. I did have a troublesome time adjusting to using it but;persistence, converting to nasal pillows, a chin strap to keep my mouth closed while sleeping and ramping up all helped. Looking back, I think it took 4-6 weeks. Since then it's been all night, every night and very beneficial. Now, I encourage people to get tested and be persistent until the adaptation and adjustment is made.
Just wish I'd been diagnosed and got on one years earlier. Rex