I bought this one 6 months ago and since I have been preparing for 70-294 I haven't read it yet. But I read some very negative reviews about it from people that have read it and took the exam. Lots of mistakes, poor editing, even technical discrepancies. I have some experience with Exchange 2007 but it is far from advanced and after I saw these reviews I don't feel confident that I will be prepared after reading this kit. Have you read it and would share your opinion? Thanks.