They overcharge a lot and the exam marks are quest...

They overcharge a lot and the exam marks are questionable; they refuse to send the test to an independent market outside of those working for csi. This means that if your mark came, but a fancy of chance of course, just one or two marks below "pass", then to prove you actually should have gotten a substantially higher mark will be impossible, as they will not review with you or provide an independent evaluation channel. All that's left is to 'trust' them, and to pay up another half a thousand dollars to rewrite the exam.