ObesityHelp

I got the call today that my sleep study results showed that I definitely have sleep apnea.  I am currently in the (hopefully) last stages of the pre-op classes & checkups.  Now, they want me to go in for a followup sleep study to be fitted for a cpap.  

After the last sleep study, which it felt like I did anything but sleep, I'm wondering if it's even necessary.  I have been this big for a while, and I honestly feel like I sleep as well as anyone else who only gets ~6hrs/night (due to work/busines/charity/kids/etc).  I almost feel like going to do the sleep study is a waste of time & sleep.

Has anyone else had a similar situation?  Maybe have some personal experience that'd be helpful (good or bad).

Thank you!