I loved this course and its easily the best MOOC I have done so far. I did it in a few passes and each time I get more and more out of it. It is very challenging academically - this is not a dumbed down for the masses light introduction.
If its too difficult then I would suggest doing just the 'contemplation labs' and then dipping into the lectures as and when you fell like it. (the labs are guided meditations, with short introductory and wrap up lectures).