I took the practice exam 3 times and just passed the MCE earlier today. I found that repeated attempts of the practice exam and the Preparation Guide (especially the links to the subsequent Docs articles) were the most useful in passing for the exam.
Congrats!
My MCE exam is scheduled for tomorrow. The practice exams seem to be helpful. I've been getting 85%-95% on those so hopefully the actual exam is relatively similar.
If you are scoring above 80% you should pass....unless they changed the scoring as it is a bit dynamic.
I used the practice exam quite a bit and was able to pass the MCE exam on my first try with an 88%. I would definitely recommend to use that when preparing. Good luck!!
Also, my best advice there is: