As a professional enterprise software developer with over 10 years in the biz, I've accumulated a large-ish library of technical books which I have read cover-to-cover. "Flex Solutions" is easily the worst of the lot.
I have only made it through chapter two and have already encountered so many code errors, wretchedly banal examples, and chunks of confusing and poorly worded grammar that I am moving on to a different book.
There is a website which lists some of the Errata, but even the extensive list for chapter one is incomplete.
I don't expect all technology books to be as readable and effective as Horstmann's "Core Java", or be as thorough as the painfully complete "Java Persistance with Hibernate", but a technical manual should at least aspire to accuracy and clarity. On both counts, "Flex Solutions" fails miserably.