Introduction to Probability: Part 1 - The Fundamentals

This course is simply close to the perfection: the content is super, challenging and rigorous, but with every question/doubt I come up in my mind straight ahead answered by the lecturer. How did he know that I had that precise question ?
Exercises are really challenging, not obvious and not "just compute" stuff, but they really "teach" something themselves, showing the concepts introduced in the lectures in different prospectives.
The form is also perfect, with a video of the lecturer to introduce each topic and then the focus goes directly on the slides, with the lesson divided in short segments plus quizzes to reinforce learning. I can see there has been lot of work on the "form" (but not on the content that - I tested it - is exactly the same) from the first version of the course published on the OCW, where the lectures there were "just" registrations of the actual class lessons. This reinforce a more general tough, that when moving an activity online, to take advantage of the new media, you have to adapt your processes to the new media and not just copy what you were used to do offline.
If I only miss something, on the side of the content is a bit of linear algebra (matrix calculus).. why I understand it is not required for the course, sometimes it comes very natural, like when speaking of independence between random variables.. On the form instead (but this is a limit of edX, not the course itself) the forum software really sucks, and I guess this is why it is very little used. It should deserve a deep redesign !
Overall a great course that opened my mind to a full new world ! Thank you !