I purchased this book in 2006 when first published as the company I was working for wanted to upgrade to SQL Server 2005 and as the Senior Database Developer/DBA, I had to evaluate how much effort it would take for the conversion of the DTS packages and sort. I found the book helpful at the basic level with it's explanation and case studies. It served as a good jumping off point as I was already very versed in DTS.
Now that I have been working with SSIS for two years, I find my skills beyond the book, however I must reiterate, it was a good jumping off point to get me thinking on SSIS.
At the time of publishing I would have rated this book a 4.5, now, I think it should be renamed with the Beginning tag to maintain that rating. As what I expect from a Professional tagged book, I'd rate it between 3.5 and 4 today.