The content is good, but the UI is not. Clicking through to the original pages this stuff was published to in the cases that I've tried has resulted in far better pages.

The purpose of this site is confusing - it seems to divide larger works into smaller units that you have to browse online. The publishers' pages just offer downloads in your preferred format above a toc linked to a web version of each individual section; I don't know how you could ask for more.

Compare: https://workforce.libretexts.org/Bookshelves/Food_Production...

to: https://opentextbc.ca/basickitchenandfoodservicemanagement/

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edited to change the opentextbc.ca link to the right book because libretexts.org linked to the wrong one.