Official paper-based guide - accurate score predictor?

I just took the practice test from the “Practice Book for the Paper-based GRE® revised General Test Second Edition” https://www.amazon.com/Official-Guide-Revised-General-Test/dp/007179123X

Is this still an accurate predictor of scores? I mostly ask because I felt as though the math was slightly easier than what I have been seeing in other practice tests and classes.