What I like most is the possibility of finding the best books on the content I work on in one place. Whether it's software engineering, a specific programming language, or a database, I can find it all on O'Reilly. And it's not just any content, it's content from great authors who have a good reputation in the context in which they write. If I were to buy every single book I read on O'Reilly, I would have to spend many tens of dollars a month. Deep dive into one technology? I'm also impressed by the video content; complete courses on a wide range of topics are the best match for me, too. Review collected by and hosted on G2.com.

The only missing feature is the ability to read books on an e-reader, like a Kindle. Review collected by and hosted on G2.com.