Let me start off by saying this test is no joke. I passed the A+ back in January and it had a couple of tricky questions but I was surprised by the difficulty of the Network+. I used the measureup practice exams and also watched the Professor Messer videos and a text book by "ILT series". My advice would be to study EVERYTHING. {Content violating the NDA REMOVED} Also don't let the simulations cause you to waste too much time. Flag them and go back at the end.
I passed with 797/900. Not the best score in the world, but a pass is a pass! Now onto Security+ for the trifecta!