I am taking the CRCM in April 2006 and was told that it is difficult as it covers several compliance topics and is a 200 multiple choice test. Sometimes multiple choice tests are harder than written exams in that the answers contained within the question may be similar but not exact. I was advised to also seek a mentor. The ABA will provide a mentor once the application is submitted and fee paid.
Hopefully this helps. However, if you go into their web site www.aba.com/ICBCertifications/CRCM.htm
there is a lot of helpful information to get you through the exam process.
Let me know if I have helped your CRCM preparation techniques?