Make sure you have a sleeping pill for the sleep test!!! That way you are more likely to go back to sleep after the tech from the next room YELLS
![EEK!](images/smilies/eek.gif)
in the microphone that you need to readjust your mouth thingy.
I only slept 2-3 hours that long, miserable night.
Don't be depressed -- it might just be the thing that will help you feel better.
It does take awhile to get used to the darned contraption.