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Summary: Poor cat didn't make it through the book ;)
Review: To all of you undergraduate students out there with this as your introductory text on quantum mechanics, bewarned that you may end up like the little kitty that appears playful on the front, but dead or really tired on the back by the time that you finish this course. Overall it's a good book, with good examples and reasonable questions to test your knowledge. The conceptual background is not quite what it could be, but if you have a professor that knows their stuff, you should be set.
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Summary: good, but could be better
Review: I'm a beginner to the QM world, but I found the examples to be difficult to understand, but after studying Sakurai's text and learning the Dirac notation, even the nighmarish problems seemed doable.
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Summary: Well, it's there.
Review: I agree with the above reviews that it is glosses over many major points, and then leaves important stuff to the problems. Many of the problems I found difficult and/or tedious (some of the solutions ran into 5-6 whole pages). Frustrating frankly. Cohen-Tannoudji is much better and complete.
Rating: 
Summary: Don't waste your time
Review: This book is one of the worst texts I have read on the subject of Quantum Mechanics. Griffiths presents the subject in a glib manner presenting the easiest of material in the chapter and leaving the student to drown in problems without a clue of how to proceed. If you ever need to teach yourself Quantum Mechanics, Use the Feynman Lectures.
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Summary: Best undergraduate Quantum Mechanics book.
Review: This is the best undergraduate quantum mechanics book I have ever read. Every undergraduate program should be using this book, the other books I've seen don't even come close. That includes Liboff, Goswami, and Greiner.I even think this book is worth a read after going through Cohen-Tannoudji. While the other books leave the student confused, with their heads spinning, Griffiths uses his excellent ability to explain things to provide as clear an introduction to the subject you could imagine. I disagree with the other reviewers, the notion that Davies book is better is absurd. As far as the problems with the examples, I think Griffiths approach is a good one.
Rating: 
Summary: The worst book on the subject.
Review: I must agree with Schroedinger that this is a poorly written book. It seems that novices who've only seen one or two quantum physics texts in their lives fall for the smooth talking style of Griffiths. Don't fall for it! For example, the section on angular momentum and spin is one of the worst I've ever read. Griffiths gets the reader lost in a heap of math without taking the time to describe the picture behind it. (I'm not complaining about the level of math in the book, but his failure in communicating the physical insight or feeling of quantum phenomena.)Even the small book by Paul Davies is better written and more insightful than Griffiths. My personal recommendations are the Feynman Lectures on Physics (volume III) and Introduction to the Quantum Theory by David Park (even Griffiths acknowledges in his own text that Park is an excellent book). After these two you may want to hit Shankar or Sakurai. (As I said above, the book by Davies is pretty good too.)
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Summary: The best undergraduate quantum book anywhere
Review: A must for any physics undergraduate progra
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Summary: Totally oustanding
Review: Excellent for the mathematically inclined student of physics. It's large collection of problems makes it ideal for self-study
Rating:
Summary: Excellent text...some hard, but good problems
Review: I used the book twice, once for atomic physics and once for QM. It is very well written, and although some of the problems were dificult, they gave me a deeper insight into the underlying physics of certain problems. The book is an excellent introduction to QM. It is easy to follow and I got a deeper understanding from working some of the derivations as problems.
Rating:
Summary: Deceptively pedagogical with lousy exercises.
Review: Don't be fooled by the informal style of this text. Griffiths has a bad habit of leaving many important results to the exercises, and he also briskly jumps over many difficult steps. He doesn't even provide a plausability argument for the Schroedinger equation (I know it's not necessary, but it wouldn't hurt to provide the steps how Schroedinger arrived at his famous equation). His exercises are very lousy and have little effect in reinforcing the material. A much better book is <I>Principles of Quantum Mechanics</I> by Shankar or <I>Quantum Mechanics</I> by Cohen-Tannoudji. In short, Griffiths' text has too many holes. (It's a shame this book is not in par with his excellent <I>Introduction to Electrodynamics</I>.)
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