Volume 1 does a bit of everything, at an introductory level, meaning a bit of special relativity, a bit of heat (thermodynamics etc.), a bit of probability, quite a bit of mechanics, some waves, etc. (there is even a chapter on vision, which explains the process of how we see). Volume 2 seems to be devoted to electromagnetism, and volume 3 to quantum mechanics.<br><br>The author is brilliant, needless to say, and is driven by a passion to understand how things work. What I like the most though, personally, is that prof. Feynman does not shy away from the tough questions. Rather, he seems to enjoy these the most.<br><br>Another nice thing is that these notes have gone through long lists of errata. I am not well placed to talk about how to use these notes pedagogically, by a physicist, since I am not a physicist, myself. However, it seems to me that they are ideal notes for people from scientific disciplines outside physics, but still very mathematical, who want to try to learn undergrad physics by themselves, and build up some physical intuition and knowledge. For instance, I highly recommend these notes for mathematical physicists with a mathematical background.<br><br>They are quite fun to read!