N T.
Helpful, but quality could be much better
Some useful advice although could be more structured - what I don't like is (I) where there was a mathematical mistake, ego gets it the way of them correcting it as they spout some vague nonsense to defend it [it's wrong, mathematically it's just the wrong sum] and (II) for the add-on pe course with an instructor, the instructor said he will share the materials and then went silent



