Well... they didn't defy the laws of physics too much... that's a plus... I guess...
However, two things got to me that I just... sigh... cannot get over. #1 - In Cuba, there is no way that Dom could go reverse as fast as a car going in drive; transmissions just don't work that way (yes, they defy the laws of physics in every movie, but for a series based on Street Racing, some mechanics has to be involved).
And #2 - Now that Dom has a kid, they have to figure out a way to bring back Mia and Brian back into the fold. Family... right? Dom's son needs to know his cousins and Aunt and Uncle. What are they doing to do?
Anyway, silly nonsense of a movie. I give it a C-.