I took Global Knowledge's CCNA Boot Camp class. I also have about 5 years of experience with Cisco devices at a 100 user company.
Using the test simulator provided by Global Knowledge (Self Test Software), I studied and studied. I could routinely score 95%+.
I was simply shocked by how much more difficult the 'real' exam was. I scored 821, but expect to ace the exam. Man, was I wrong! I was more prepared for this exam (or so I thought) than any exam I ever took in college.
The questions regarding VLANs and spanning tree were so much more in depth than anything that was taught in the class or self test software.
I have lost faith in the Global Knowledge package. I think it is too 'elementary' for what you actually face on the exam.
I am looking for guidance in pursuing a more comprehensive exam preparation package.