Yeah I promise it's not that bad. If you took 3-4 of the AAMC practice tests online it's just about the exact same thing except you have to sit in a room with some big ole earphones on.
I took it 1/31, darn 8ams. I had ~9 hours of sleep and two scotches to help me slumber, so I was out like a baby.
When I got my score back, I had pulled an allnighter for a P.Chem/I.Chem/Biochem2 trio of midterms and I was literally falling asleep while pressing refresh. My roommate woke me up at about 4pm and I hit refresh instantly and started making some manly grunting and breaking out every football pump-up I remember. Good times, good times.