I will be taking the Google Professional Cloud Network Engineer Beta Exam Friday 2/22/19. I have written a day-by-day article on my blog site on how I am preparing for this exam. This should be a very hard exam based upon what I experienced for the Security beta exam.
Good luck, John! I look forward to reading about how you found this exam, too.
Good luck with the exam and thanks for providing the link to your prep for the exam!