I just started studying for the DAT and I have been doing only PAT for the last 5 days on CDP only. I took the 4th test on cdp yesterday for the first time and scored a 20, not bad. The program is really beneficial and if you use it in conjunction with these forums for help on how to tackle each question type, you might have shot. Start off by doing the first test, section by section, until you understand why each answer is right or wrong. Once you have done that, try the whole test and force yourself to work through ech question even if you know the answers already. Then take the second test, the whole thing at once and see how you do. Review your test and understand the correct answer for each question and then retake the test. Do this for each test afterwards and if you notice that you have difficulty with one section in particular then you can go back and practice on earlier tests giving yourself 10min to complete that section. Make sure you research the best methods for completing each section, this will help immensely. Good Luck. Don't bother asking anymore questions about CDP, just buy it. It will be the difference between having a shot at DAT PAT and not.