Not the best exam experience...
An early sim took me about 25-30 minutes as it would just not respond to the commands I was entering. The config necessary was acheivable with several different commands, but there was only one specific command the sim would actually take any notice of. I'm not even talking completely different commands just slightly different parameters that acheive the same result, it was that fickle.
I have configured the same scenario at home and every command I tried works perfectly fine. I was just sat there thinking what the hell is happening, why wont it work? I started looking elsewhere for problems that didn't exist. Pretty horrible feeling but I couldn't move on because what needed to be corrected was simple, it just wouldn't let me fix it. Got there in the end but a terrible way to get going, thanks to Cisco for providing an unrealistic and stubborn Sim.
So, I was screwed on timing from early on and had to rush through and with a only a few minutes left I hit a big simlet on the second to last question. At that point I thought man this isn't going to be my day. Every sub question on the simlet required different troubleshooting and I barely had a second spare to think properly, it was the hardest question I've ever come accross on the CCNA track - practice or real questions. I managed it but ran out of time for the last question.
I can't tell you how relieved I was when I saw 876 on the screen