Yesterday I passed the exam TS: Microsoft SharePoint 2010, Configuring with 950/1000. Even i know a lot and i learned a lot with MCTS Self-Paced Training Kit (Exam 70-667) the questions are somehow not really fair. The questions try to trick you by giving you answer options that you would not apply in real world. I guess what i want to say is: The book prepares you technically to go to the exam but you still need to deal with question that are not straight and you need to guess the best answer.
I am scheduled for the 70-668 next week, we will see what happens there, cause this will probably be even worse, cause there you will have to read the exhibits first before you can answer questions!