Feedback on Principles of Marketing Clep

I will be taking the Principles of Marketing CLEP this Saturday and am currently using the REA book to study. I used the REA book to study for the Anaylzing & Interpreting Literature CLEP, however I felt as though it was the practice tests that helped me pass the test and not necessarily the information in the book. I have heard several people talk about InstantCert, but I am a little afraid to try this site because I used another like it (Speedyprep) to take the the Principles of Management CLEP and failed it. The money that I spent on the first month ($9.95) was refunded, but I wasted time studying and about $100 taking the test. Please give me some feedback on your experience with the Principles of Marketing CLEP and study materials that your used. This is the last test I need to take in order to graduate, so it is a must that I pass this test. Thanks

 

The Marketing CLEP has a feedback thread in this forum (2nd page, at the moment) where you can read my feedback. I got a 78.

InstantCert is OK; there are a lot more people on their forum saying "I passed" than "dang Instantcert" but if you cannot fail, then I would augment it with extra resources.

Phillip