L01 as an example.
You'll see Prof. Erik's notes on the right, and the cool thing is that the notes actually sync with the video (It automatically switch from page to page based on where you're watching).
Another thing is that it provides scribe notes which I find useful for later review.

The link you gave is a course from Spring 2012. A classmate of mine discovered a mistake in one of the lectures which was corrected in Spring 2014. Therefore, I think in terms of correctness, Spring 2014 might be more reliable.