First thought, the 1900s are no longer on the test. Its the 2950 you need now. I am close to my sitting also and from what I gather, apart from having solid theory, for the sims you should know switching inside and out, routing, access lists and work a bit harder on the WAN stuff.
By the sound of it, your serious approach to it should should see you through but if you do bomb, at least you will get pointers where you should direct your study for the second and probably last attempt.
Yea I know the 1900's are old...my buddies in the IT section at work gave me them and the 2500/2600's for free...so I wasn't complaining to much...LOL
Yea Access lists kick my rear, but I am getting better. Would like to get my hands on a 2950 so I can learn more.
I was also wondering for after the CCNA... I would like to get into VIOP and wanted to know what direction I should go. I have a solid background in Teleco from the Air Force but it seems that alot of peps are not willing to help or flame you for not knowing...LOL
In my humble openion, Boson and Packet Tracer were more than enough for me to pass the sims. I had just over 2 weeks of trainning on real routers.
Exam questions also helped me. Instead of solving 10 questions in 15 minutes, I'd solve them in 10 minutes, simply because I've been through very similar stuff. Loosing more than 4 questions just because you missunderstood them or haven't been through them before can indeed make a difference in your final mark and in the worst case fail you.