i have been reading a lot on this forum in past few months, this is my first post.I passed the cwi exam on my first try. Im here to tell ya that the practical part of the exam is one messed up puppy, in my opinion, they dont want to know if you have the knowledge of measuring discontinuities, they want to know if you can be tricked into putting the wrong answer.that was the only part of the test that i felt really uncomfortable about, the open book and the fundamentals was very easy to me, but i will say that i studied for 2 months before i went to a very intense prep course given by real educational services and taught by gerald taylor. if any of you want to take the test i highly recommend real educational services, i was very prepared for the test.