Watch the scene starting at the 40 min mark. Skip the rest.

Rating: Null/10 (9 October 2015)

I'm not following the series and I'm not sure how to rate such a moronic movie, so I'll just rate it based on entertainment value.
All the talking and background "story" is boring and you can skip all of that.
When it comes to the few major action scenes, it's better. There are some nice chases and stunts. However, there are 2 major problems with them: 1. "Michael Bay" extreme close-ups and extremely fast editing which sometimes doesn't even let you understand what is going on in the scene. 2. It's all so over-over-over-the-top that it's completely unrealistic and unbelievable. Cars and people survive giant crashes and falls, everything fits in place by mere chance again and again. Yeah, it happens in every action movie, but not so over the top - there's a limit to the suspension of disbelief, even in this kind of movie. Needless to say, there's no real tension since you know the good guys will always survive/win and the bad guys will always lose - but that's nothing new either.
All in all, the few major action scenes are entertaining, yet extremely unrealistic and sometimes hard to follow. Everything else is not even worth mentioning.
So, the highlight of the movie is a long chase scene starting at the 40 min mark and lasts 20 min - and it's more or less the only reason to even consider watching this movie.
One more thing: I'm not sure how much Paul Walker had to film before dying, but I was surprised to see that he was left as a main character throughout the entire movie! So either he filmed most of his stuff, or they did a very good job with body doubles (including his two brothers) and CGI. Being non-PC, I have to say that Walker's death added a lot of publicity to this film and will probably have a great contribution to its success - I myself didn't follow the series, yet watched this one.