Well, me. I signed up back in 2013 when life membership was pretty cheap, did a few lessons, got bored carried on with other things. So much so that when I go it tells me that it looks like I am new here! Probably been there less than 50 times in 6 years.
This course is the stuff that you just don't choose to do yourself because.. well, why would you. But when it is in one course on its own that you paid for, it makes sense to do it. That is why I did it.
And I believe I have learned stuff on this course as well as it has pushed me into really listening to what I am doing. Some of the lessons are - my god, why would anyone need to be told that, and some are wow, thats good - One thing I am not is consistant, I can do some quite advanced stuff while falling down on some real basics.