I don't know what I expected from this movie. It's a total mess. But let's try to stay positive and start with a good point.
The opening is probably the best part of the movie so make sure you enjoy it. Additionally, all the scenes with Jacob were surprisingly good and funny where on the other hand the scenes with Roman and Tej aren't that funny anymore. Also you need to stay till the Post credit scene. I would say it's worth the wait.
But enough good things. The story is very bad. Normally, the action compensates the bad story but this is not the case here because the action is also one of the worst we have seen in a Fast & Furious movie yet combined with even worse VFX. Furthermore, the cars should be a very important aspect of the movie but no, not in this one. The cars play a pretty small part and are just there so they can call it a Fast & Furious movie. Also the movie is too long. We only see bad action after bad action and then learn about how a new character is related to this whole family, just boring.
And the most important question: Are the scenes realistic? Not really but after we have seen a car in Space the scenes are relatively realistic.
With this movie Universal just wanted to make money but completely forgets about us fans. After we watched it we are forced to watch the next one and spend even more money which is just too bad. Well, I think that was everything and I hope you enjoyed this review.