I had to skip the courses, my bosses are a bit cheap!
I downloaded as much cram stuff as I could from CitrixXPerience.com, and put it together with my existing experience. I also managed to borrow some of the course manuals from a couple of my instructor friends - but, to be honest, I only skim-read them.
So far I've done the MF XP CCA, to brush up my skills - I got 82%, which I'm very pleased with. At least 50% was the same as the 1.8 CCA, so you shouldn't have many problems. The pass mark is now 72%, so you've got to get one more question right to pass.
I did (and passed) the NFuse 1.51 exam last week. Again, it's 50% the old exam, so the cram stuff is very useful. The rest is all new, including Substitution Tags (about 5 or 6 questions), and new features - but I got all the information from the 1.51 Admin manual.
Program Neighborhood and Load Balancing next week.
I'm not really in a position to give advice, since I haven't passed all the exams yet, but I would say that it's helpful to re-read the old material, then bone up on the new features. It's worked so far
Good luck with your cert!