I used the PPS ones as well, and was sucessful first time through. Not only to they let you practive the test and provide answers, they teach you how to take the test, and especially what the graders look for on the charettes. Yes, they were expensive, but once I was done with them, I got back about 75% what I paid for them (I sold them right here on Land8) I got some money back, and helped out another LA by discounting the books. Win Win.