I used Holt's material before I wrote the exam. They'll give you a different test every time you take it from what I heard. I only had to take it once. Holt has a lot of good advice in my opinion. Remember to get a copy of the latest SPS 316 and highlight all the changes in your code book. Probably just me but I hate the index that comes in the code book. You are allowed to take a fair amount of material with you.