1. I've seen on more than one site, that an individual or two has failed the practice exam and passed the real GCIA exam. I've personally failed a GIAC practice exam and passed a real exam. People have passed the practice test and failed the real thing. How do you compare the GCIA practice test to the real thing?
2. I am on my third practice test and all do the upmost respect, the questions (not so much the labs), start to repeat themselves. How can you gauge your understanding of a question/topics that you've seen before? If you've seen a question before, the accuracy of your score can negatively impact your individual assumption of exam readiness. I kind of wish the pool of questions were larger. That tells me something, but I am not going to say it.
3. Labs - Some of them are common sense. Some of them you can find the answer just by glancing at Wireshark tabs. Some of them I feel are time consuming. My personal issue is, the amount of time I have remaining once I get to the labs
Truth be told, I am going to buy another practice exam or two just to work on my time management.