The following I would like to not go unsaid about this book:

1) The prose is casual and clever.
2) Surprisingly: the disarming prose does not compromise the organization of the principles and material, as I feel Griffiths' texts unfortunately do.
3) Speaking of Griffiths: Morin's problems are just as inviting of creativity (as Griffiths: the principle strength, I feel, of his texts) and encourage real "thinking outside the box" as Griffiths. They are challenging and provoke deep thought, drawing forth the depths of the reader's creativity.
4) The unique addition of physics-limericks: I find them strolling into my mind while poring over a difficult problem. They are funny (or annoying if you are looking for The Way To the Answer amidst equation-jungles (Morin's text does not appear to me as an uninformative equation-jungle)). They actually help reinforce the principles well, and succinctly describe some profound physical-principles.
5) The inclusion of problem-solving advice, and good habits to get into if you want to be a physicist. On that note: I recommend a read of this text even if you've thoroughly-completed your classical mechanics sequence. Morin encourages checking of the limiting case, examining your solution, etc., and other habits that are "in the spirit" of physics.

Conclusion: this text is rich, fun to read, inviting of creativity, brimming with clever and informative prose, and will help you be a better physicist. Best of all: plenty of good physics-habits are taught by this book that are beyond the scope of classical mechanics. My heartfelt recommendation.