Hello all, I already passed CCNA and I never used a sim for that portion. I did however use the free lab access at r1r2.com. You have to keep some pretty odd hours to gain access to it because A: it's free, B: everyone and their mother try getting on one of the four labs. But you can telnet to r1r2.com to gain access to the labs. Just go to the website first to see what the password of the month is. By the way I have CCNP Simulator from Sybex. I hate it the sims they have are so limited. They don't allow you to create a scenario for yourself. Good for only practicing their specific labs