My experimental section came up at the end of my exam and was clearly identified as a second quantitative that would not count toward my score. I was bleary-eyed and exhausted by that time, but since ETS actually offered a cash incentive to the highest scorers on that section (yes, seriously - I believe it was $250), I gave it a shot. There were a lot of numeric entry-type questions (the ones that'll appear on the new GRE) plus some other kinds - unfortunately, I don't remember what those were.
I studied exclusively from the Powerprep software because based on my and others' experience, it gives you the most accurate predictions of your score. The software has 2 full-length tests and they're computer adaptive, so as your test-taking ability improves, you'll get a slightly different set of questions every time you take them. But taking them too often will familiarize you with the questions, which could lull you into a false sense of security. I took the real GRE twice and both times, I panicked on the quant and completely guessed on the last 10 questions - something Powerprep didn't prepare me for!
