The movie is a great blend of action and very dark humor. Because they did not use Spiderman, Venom is introduced as the anti-hero version of the character, doing bad things (mainly eating) bad guys. Michelle Williams plays the ex-wife of Eddie Brock. She does a really great job playing off Tom Hardy and brings a lot of comedy to the movie, which is outside her usual acting roles. The best part of the movie is the discussions/arguments/bickering that goes on between Brock and Venom, mostly in Brock's mind which makes it look to everyone else like he is talking to himself. It also requires Hardy to do a lot of physical comedy, which he turns out to be great at.
The 4K set is a two-disc set containing a UHD disc and a regular Blu-Ray disc. On the UHD disc, there is only the movie and a preview of the movie Into the Spiderverse. All the other extras are on the regular Blu-ray. Those include several deleted scenes, including an extended version of the end credits scene which teases where the next movie will go, assuming it gets made, then about an hour's worth of making of and behind-the-scenes material mixed with some featurettes on the history of the Venom character. So there are a lot of good extras.
I cannot say everyone will like the movie, and it definitely pushes the PG-13 rating to the limit, mostly because of the language. There is a lot of swearing and some sexually suggestive jokes. It is closer to Deadpool than it is to, say, Avengers. But it puts a different twist on the MCU movies and sets up a good possible franchise to exist in that universe. It is worth checking out.