The web is full of people advertising their prep material selling websites. They have all sorts of varieties; test engine, online assessment, VUE programs. But my experience with all of these makes one thing crystal clear; that PDF prep material is the best. I have my reasons: it is convenient, manageable, printable, easy and quick to learn/revise.  And that is exactly what Pearson Exam provides and whats more, their material is just perfect from every aspect. Well though-out and definitely accurate is all I would like to say.