Just took and passed the test about 3 months ago. It took about 6 weeks to get the results.
Etaco's advice is sound, you'll want the textbook and to take a couple of practice tests ahead of time to get used to the format. The test was VERY heavy on aerobic exercise metabolism and plyometrics. The video portion is very simple (there were questions on wrist curls and DB flys), if you have any kind of exercise background you'll be fine.