Yes, these exams are challenging. You are wise to prepare thoroughly.
For more practice, see the sample question/practice test FAQ at degreeplanners.com Degree Planners - Sample Questions and Practice Tests
The specific exam feedback at degreeforum.net is invaluable. You have to be a member (use code 85722 for a discount). It's well worth it, though, because you will have access to current feedback on the exams and since exams are periodically rewritten, you need current feedback! You'll also have access to helpful flashcards.
See a 5 minute video tour of instantcert.com here: Degree Planners - Instantcert.com