[BeerAdvocate]

I work for a DME (Durable Medical Equip) company that specialize in CPAP equipment.
Every single CPAP machine has the ability to record your sleep pattern.
Some require a card that slides in the machine. The newer ones have a modem that attaches to the back so an RT can monitor you remotely.
All you have to do is contact your provider and they should be able to give you a report on how you are actually sleeping with the machine so you can see for yourself if it is making a differance.