I have just started the EDX course, as was said the first two chapters are a waste of time.
I am using Mint 17 MATE and can equate to it through the Ubuntu explanation, although there are several differences.
I have been using Linux on and off for about 12 years, so have seen a lot of changes.
I am doing this course for a refresh more than anything else, although I have picked up a couple of pointers and have just finished chapter 5.