Rick Warren was interviewed earlier this year by John Piper. A report had this to say:
"Piper, surprisingly, did not find any major problems doctrinally in the book. 'When I read the book, I thought "what's the issue here?"' he said. And with 20 pages of notes, Piper said he read the book very carefully. Some of what Warren had to say in the bestseller even made Piper's 'spine tingle with gladness.'"1
I have to disagree with John Piper. You don't have to read this book carefully to see the problems, in my opinion. They are glaring. I became acquainted with this book when I was asked to teach one of the purposes - purpose number 2. So, I read the preliminary chapters in addition to the chapter I was to teach.