Elija:
Is the Sybex esim ISBN number 0-7821-2728-2? If so, I just received this today from an ebay purchase. Is there a version number on the box? This appears to be an evolving product. I'm aware of two Sybex products focused on CCNA. I also have the Cisco esim package and will be comparing the two this week. Did you work the sample esim from the cisco site? Did you go through the esims multiple times until you could do the sims without thinking? Is there any reason for not working with all the question banks until you score perfect everytime? Did you see questions on the exams that simply weren't covered in the bosen and sybex questions?
Did you have the sim that was documented earlier on this board? Without revealing details, do you remember the scope of any of the esims?
Did you feel you did ok on the simulations?
FYI, I am displeased with the presentation via both the Cisco and Sybex drivers, to the point that I have converted all (actually, most; some don't convert easily) of those questions into "transdumper" format. Transdumper is available free on the web and runs within a browser. The advantage is that you get immediate feedback and going thru a bank of questions requires minimal keystrokes. Probably most important is that you can save out missed questions to a separate bank and review just those. Of course none of this helps with simulations.
I empathize with your situation because I'm planning on taking the test this month, presuming that I have developed a feeling of readiness, not currently present. I suspect that you could have been victimized by the random selection of questions from the test bank and, on another day, you may have passed. One thing I've noted from the two Cisco sources for questions, 200 from the esim package, 300 from the Odom book, is that they tend to twist the questions in a variety of ways so that you recognize test elements from any given angle.
The problem with studying for this exam is the scope of detail required. I have been impelled at least a dozen time to post queries on this board on subject detail, but instead have spent the time with web research. So far I haven't found a comprehensive clearing house for all information required for the CCNA exam. I'm extremely disappointed that I haven't heard back from Cisco regarding the missing solutions for esims from Odom's book, particularly since there appears to be a growing emphasis on simulations during the exam.
Enough ranting. Hang in there; you're too close to quit now.