[abecedarius]

I don't know about useful -- physics is not currently as useful to a programmer as, say, probability theory -- but I'd recommend volume 1 to anyone ready to follow it, just for the mind-stretching. Volume 2 is longer, harder, and less different in its approach to its main topic, electromagnetism. Volume 3 is short, unique, and doesn't depend too much on Volume 2 -- I was able to profit from it without mastering volume 2. (Nowadays there probably are better intros to quantum mechanics, though. I don't think there was any one really good intro when I studied it back in the 80s. The most enlightening were Feynman vol. 3, Dirac's Principles, and another whose authors I've forgotten.)

Added: There's only one other introductory physics text by a historically first-rank physicist, and that was Maxwell in the 19th century. (Maybe there were earlier ones, like Euler's books on mechanics, which I haven't read. Einstein's Relativity was a popularization like Feynman's QED or The Character of Physical Law rather than like the Feynman lectures. Newton's Principia has also been used as an intro text, which seems hilariously inappropriate.) The lectures are also unusually full of the this-is-how-a-physicist-thinks thing which is hard to pin down.