I’ve had bad experience from both Packt and Manning, it’s simply not trustworthy. I’m sure there are a good mix of bad and good books, but I’ve bought books that simply rephrased API docs of insert-popular-open-source-language.
I support independent publishing and small publishers, but as a consumer, you need to build trust in the quality of the content across the board, not just a handful. If I see a book from Springer or O’Reilly, I know I can at least trust some baseline expectations from a book - true there are some bad apples as well, but they are at least edible unlike Manning/Packt where I got a load of shit instead of an Apple for $29.
I agree with you regarding Packt - books I've purchased from them tend to be more miss than hit. I haven't had the same experience with Manning though. In fact, Manning has been my go to rather than O'Reilly, the former king of technical books, for a few years now.
I used to be a big O'Reilly fan, but the quality of their content seemed to go down 5 or so years ago. It seemed like they were at the peak of churning out books on every topic imaginable - I think they stretched themselves too thin. They seemed to go from great to mediocre overnight. When they closed their online shop a year or so back, and really started pushing Safari hard I stopped getting anything from them.
I support independent publishing and small publishers, but as a consumer, you need to build trust in the quality of the content across the board, not just a handful. If I see a book from Springer or O’Reilly, I know I can at least trust some baseline expectations from a book - true there are some bad apples as well, but they are at least edible unlike Manning/Packt where I got a load of shit instead of an Apple for $29.