I've used Modern States to study for two tests now, both of which they paid for with vouchers after I completed the practice questions. I passed both the Analyzing and Interpreting Literature and Humanities CLEPS using only Modern States resources and studying off and on for about a week each. I realize that everyone tests differently but they've been great for me.

MSK9, MD
Resident Physician
Masters & PhD Candidate
Resident Physician
Masters & PhD Candidate