I have spent more time with the Feynman Lectures on Physics than with any other book or set of volumes on any subject.  I am most familiar with the first volume, only because I haven't found the time to spend on the other two.<br><br>Though there are more exact and rigorous formal treatments of virtual every topic Feynman treats, these are found in more advance texts, and/or scattered through many different books, no other single collection of physics books, that I know of, presents so much material in such a compelling and accessible form at the "introductory" level.<br><br>I recently purchased the New Millennium Edition, boxed set.  The manufacturing quality is, in general, high. The books are solidly and attractively bound.  I agree with another reviewer who found the font to be a bit on the light side; and combined with the glossiness of the pages, it is a bit of strain on my aging eyes. (Reading glasses help.)  Nonetheless, the electronically formatted text, especially when it comes to the mathematical expressions is truly beautiful. All of the figures have also been converted to electronic format which makes them more crisp and clear. The conversion was a huge undertaking, executed deftly. I am genuinely impressed and grateful to the people who accomplished it.<br><br>Feynman was great at what he did, loved what he was doing and had fun doing it.  That exuberance shines through in these volumes.  The new format adds considerably to these invaluable volumes.<br><br>Good job, Mike, et al.!<br><br>Thanks!