It is done. An interesting test, on the whole. Eight blocks of 46 questions each, and you get one hour allotted time per block. You have one hour of break time, to divide between slots as you see fit. And then if you finish a block early, you get that extra time added to your break. Med students, usually my classmates more than I, spend a ridiculous amount of effort figuring out exactly how long they will take for a break between each block. One of the study guides I used even has a plan written out in it. My personal strategy, should anyone care, was to do two blocks straight through, refuel with coffee, do another two blocks, more coffee, and then, since I had about an hour and twenty minutes of break time saved up, I took about 5-10 minutes between each of the following blocks to get more coffee and sugar. Before the last one I took about half an hour, just so I wouldn't be dragging. But it worked out, and I am done. Only one more test that matters between me and graduation.
Oh, and should anyone be reading this for advice, having found it through Google: Kaplan questions are exactly like the real thing, and Oasis's song "Don't Look Back In Anger" is great to have running through your head as a soundtrack. But that's just me.
EDIT: In response to a concern voiced to me privately, yes, I did eat dinner. A large dinner. To make up for having only coffee and sugar for 8.5 hours straight.