As per usual, Lewis makes these courses super valuable and fun to attend.  Due to my background, I decided to re-attend the course on Spring as there were a lot of concepts which did not stick after having done the course > year ago.   I love the new structure of the now 2 part course and appreciate the way the course has been broken up to first, lay the foundation and then going into more specific applications of those foundational concepts (ie the mvc and spring boot).