The movie is a pretty standard action film and is derivative of movies like Die Hard and The Towering Inferno without being outright copies of either. If you have seen any of The Rock's action movies over the years, it definitely falls on the end of the ones where he is nearly indestructible and can overcome any obstacle. It is not as tongue in cheek as his role as Hobbs in the Fast and Furious movies, but almost. So, there is definitely a lot of suspension of disbelief that is required to get through it, so if you cannot do so or are hypercritical of unrealistic action movies, this is not for you.
The 4k set is a two-disc set containing a UHD disc and a regular Blu-Ray disc. The film looks and sounds great in the UHD format. The bonus material (which is included on the UHD disc, so you do not have to switch over to the regular blu-ray) includes deleted and extended scenes, a commentary track on the movie with the director, and a few short behind-the-scenes features. Good for what was included, but not hours worth of material. Excluding the commentary track, the extras probably clock in at around 45 minutes or so. Overall, it is a good movie, but not exactly a unique story. It is a bit predictable, but I think fun nonetheless. If you accept it for what it is, and what it is not, I think you can enjoy it. You do not have to watch every second of it to get what is going on and at just over an hour and a half, it flows well and does not feel too long.