I have not tried the DSST practice exams yet (I assume you mean the ones on The DSST Program) but I am very interested to hear what others think of them as I was planning to use them for my upcoming Business Law II and Money & Banking exams.

You might find this useful: Petersons has DSST practice exams! They're just really, really hard to find on their site Try this link:
US Air Force - Education and Library Resource Center - Dantes Subject Standardized Tests

__________________
Chris
120 credits, 3.60 GPA, B.S. General Business, Excelsior College to be conferred 6/20/08

CLEP Accounting-71, Humanities-70, Marketing-78, Macro-70, Sociology-66, HG&D-72, Management-77, American Gov't-63, Business Law-73, Edu Psych-67, Biology-71; DSST MIS-66, Statistics-78, Principles of Finance-66, Money & Banking-65, Health-65, Business Law II-69, Environment-68, HRM-70; ECE Ethics-A, Org Behavior-B, Info Lit-P, Labor Relations-C, Ops Mgt-A, Business Strategy-B