70-536 Certification

I’ve decided to start studying for the 70-536 certification exam. I have the exam study guide book, which is currently serving as a great door stop considering it weighs 25 pounds. Am curious as to other people’s experiences with this exam and if they have any suggestions for studying. I started studying for it before and was scoring around 80-90% on the practice exams, but am not sure how realistic they are with the actual exam. Any insight, experiences or advice would be greatly appreciated!

Thank you.

.matti