I have started Level One, but have put it on hold. The way that they word things is vague, and from what I hear doing the Basics course can get you used to their "format".
I plan on grabbing the Basics course when I get the opportunity and doing that first. I could just go online and ask people who have done it, "what do they mean by this? What do they want?", but that isn't what I bought the course for.