"Understanding Quantum Theory" was the first text that we turned to in a course I took last semester, which studied the philosophical implications of quantum theories... the logic, I imagine, was that complex and counter-intuitive concepts would be more palatable in faux-comic-book form...
I'm afraid this didn't turn out to be the case, While the illustrations are fantastic -- reminiscent of ink-heavy works such as Art Spiegelman's incredible "Maus" -- the concepts are no easier to grasp. The illustrations could have been used to better ends if the authors had a better idea of what makes these concepts so hard for beginners -- diagrams, when included, might have been more artistic than flat scientific sketches, but they were just as hard to interpret. The illustrations here are used, it seems, to trick the reader into thinking the concepts are simple and straightforward. The result, however, is that you (or I, at least) end up scratching your head and reading dialogue-bubbles which don't make sense in the least until the fifth or sixth reading... and even then, are often impossible to understand without a live discussion and Q & A.
Which is not to say that this text is a failure -- put aside what it was TRYING to do, and it is still a solid outline of basic quantum theory, and a good introduction to the major figures and developments in the field. The art might not make the material more accessible, but it doesn't hurt it either -- helpful or no, the illustrations make the lessons a more entertaining challenge than straight text would ever be.
BOTTOM LINE -- it's a good outline of basic quantum theories, developments, and figures. The art makes it pleasant to look at, but no less confusing to the beginner. If you're curious about the ideas involved in a radical reinterpretation of time, space, and matter as we interact with them, this is not a bad place to start.