While I'm a huge fan of Wozniak the engineer, I wasn't thrilled with iWoz the book. The writing is very simple and very repetitive - you could condense the book to half the size without omitting anything. Also, I felt that many of the topics discussed lacked follow through. For example, I was drawn in to a subject like the creation of "CL 9", only to abruptly leave the topic and move on to other times.
That being said, as a memoir, the book succeeds in revealing Woz's personality and what makes him tick. It was interesting enough to not only lead me through the book, but to pursue other perspectives about the beginnings of Apple and his relationship with Steve Jobs.
So, in conclusion, "iWoz" is worth reading, but don't set the bar too high.