The 4k set is a two-disc set with a UHD disc and a regular blu-ray disc. Both of the discs include the movie and the special features. The A/V quality of the UHD disc is very good. It is not quite reference quality, but close. There are about 30 minutes of bonus material consisting of four different making-of featurettes. The movie is a good spy thriller, with a handful of action scenes spread out well throughout the movie. The story is not told linearly. It plays out similarly to the movie Memento. The movie starts partway through the story, and then flashbacks are used to tell Anna's backstory, to fill in gaps, or to show events from a different perspective than when they first played out. So, by the end of the movie, you know how Anna was recruited into the KGB and the CIA, but as you watch the movie, there are twists and turns that play out via the flashbacks. The action scenes that are in the movie are very good, but very violent. There is a bit of sexual content and one nude scene in which Luss is topless. So, it is not really a family-friendly movie.
Ultimately, the movie is well-written and very well-acted. Luss does a very good job in what was her second movie role, and Mirren pretty much dominated every scene she was in. Luss was especially good, considering she came from a modeling background and not an acting background. Evans and Murphy did well in their supporting roles, but neither were in the movie as much as Luss and Mirren. While it was not a blockbuster movie, it is much better than a lot of people will likely expect. So, if you are a fan of spy thrillers, this is worth the time to watch.
