Thanks for this! Good info based on your knowledge and personal experience.
I just thought I would note that what Joanie refers to as an Autotitrating CPAP is the same as what I referred to as an APAP. Pressure changes as the need for it changes, both minute by minute, often from changes in position, and over the course of weeks or months, hopefully going down with weight loss. The bane of all CPAP users is leaking around the mask. Less pressure means fewer leaks, so even if one never entirely gets over the need for CPAP this is still a good thing.
Thanks mate. For the explanation.