I just passed my 070-680 and now need to move onto 070-686. I have been told that the test changed drastically and the Training Kits that are out there may not be vaild. I found this one online can someone tell me if it is still valid or if I need to get something different

Amazon.com: MCITP Self-Paced Training Kit (Exam 70-686): Windows 7 Desktop Administrator (978073562717: Craig Zacker, Orin Thomas: Books