Awful.
Almost 3 years later I requested another sleep study because I was done with no progress. The study found out that what I really needed was a BiPAP machine and a MUCH higher pressure.
Now the insurance replaced my old machine by a Philips-Respironics DreamStation Auto BiPAP, which comes with an app (DreamMapper) that you can sync every morning using bluetooth and it shows the usage time, % of mask leak detected, and detailed AHI information like: Total clear airway apneas, total obstructive apneas and total hypopneas.
This is really all I needed to monitor it myself and adjust whatever I need without having to wait 6 freaking months.
I have a friend that didn't want to go through the study and ended up ordering the same machine as I have. He's been adjusting his settings based on the app. He's very happy with the results and probably would have similar results if he had done the sleep study.