i took it and passed it about 8 months ago.
First, take your time on each question, if you've done the work, you won't have any problem completing it in the time allowed, and you can't go back once you answer a question.
Second, don't let the first few questions get you down. The first 10 questions and the last 10 questions took more than half my time, and I think it's a tactic to try and get you to second guess yourself, and make you hurry.
Above all, relax. It's really not all that hard, and if you know how to configure routers, you'll pass.