First and foremost, this is an artbook...ish. There is a reason why it's called The World of Cyberpunk 2077 and not The Art of Cyberpunk 2077.

I like the narrative take, how this was published in universe because of the sensitive information used was too risky to have on the Net. It does contain some good information that helps flesh out the world. Do I wish it went into more detail at times? Yes. Do I regret reading it? No. It did have some sections that I thought were really interesting and added details to basic concepts and items (braindance being the main one for me). To be honest, you can probably find a lot of the information in here on the internet, and unless you are going for the deluxe edition (includes a Johnny Silverhand poster, 4 postcards of in-game cars, and temporary tattoos featuring the logo of all the gangs) I'd recommend skipping out on this (or buying it when it's super discounted).

One thing I would recommend if you are going to get this is get it either before you start the game or when your early on in gameplay. A lot of the information you discover in-game, but if you read about it before playing I think it would make the experience so much better.