I started the course here around one and half month ago and it was the BASE to help me during the test. I would like to say that the test IS NOT EASY, once again ... IS NOT E-A-S-Y. If you are in the same road right now prepare yourself well, do ALL the labs and really try to understand how it works because they won't ask you directly what is X or Y but they will put it between the lines, so you will have to understand the context.
THANKS LINUX ACADEMY! and good luck guys, you can do it :)