I used this book to get going with SSIS. I would rate it a bit lower than Steve did, maybe 3.5-4.0, but then I'm not buds with the authors ;). This is one of just a few SSIS books available and it is vastly better than the $44.99 Microsoft Press "Step by Step" volume which, as its name implies gives step by plodding step for various tasks -- with very little exposition or explanation.

One other thing about the "Professional...." red-cover book worth mentioning is that it has a sequel, "Expert SQL Server 2005 Integration Services" from two of the larger team of "Professional..." authors. The "Expert..." book could be considered a second-semester text for those who've covered the basics in the first book.