7/10 stars means this movie is above average and entertaining, all the way to the end... I could even watch this again, in a few years (somewhat rare). A '7' is solid entertainment, but not among the best movies of all time.
The movie comes off as a somewhat subtle, but straightforward murder mystery. If broken into 2 parts, it could easily be a well written TV cop drama (indeed, one actress does appear in 'Bosch', which is excellent). The subtleties seem to be focused on types of people, and how they interact -- things a perceptive person will have noticed, in life. In this sense, the characters are authentic and interesting.
Actually, now that I mention Bosch, I think that fans of the series will also enjoy this movie. Also, fans of Stallone who might enjoy something a bit more sophisticated.