My biggest complaint about the movie is that it lifts too much from the prior movies, including a villain from the agency, an updated version of The Thin Man character (played by Crispin Glover in the prior film), a mogul bad guy, etc. The "empowered woman"/"girl power" theme of the movie was fine, even if a bit ham-fisted at times. As you can see from some of the comments on Amazon, it turned many people off, but it is not something that bothered me all that much.
The 4k set is a two-disc set containing a UHD disc and a regular Blu-Ray disc. The movie looks and sounds great in the UHD format. The UHD disc has previews that play before the menu loads, then the movie itself. The rest of the extras are on the regular Blu-ray disc. They include deleted scenes, a gag reel, several short (5-7 min, give or take) making-of and behind-the-scenes featurettes, a feature on Elizabeth Banks in her roles as actor and director, and the music video for the movie's theme song. Overall, it is a decent movie, but not great. It is not as good as the original 2000 movie but on par with the 2003 sequel, full throttle. It will definitely not appeal to everyone, but for a two-hour action movie, it is worth checking out as long as you accept that it is not award-winning material.