I passed with success the CC exam one week ago.
Some advice for those preparing for certification:
1) Be prepared and confident in your knowledge; train more than the minimum required.
2) Be sure you understand the question, read twice and slowly.
3) Choose the best answer, even is not the best possible solution.
4) This is an exam not the real life - you may be doing differently at your job as requested by your employer.
3) Don't rush - I finished the exam in less than 1 hour (maximum time is 2 hours).
Good luck!