Can you easily get books in?
Yes, but it's confusing!
Settings -> Import and Export options
.csv files from goodreads import just fine - and there's a nice progress bar. With a list of all records imported, and polite error messages for the rejected ones.
It imported 262 out of my 308 want-to-read books from GR
It imported 312 out of my 351 already-read books from GR
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Can you easily get books out?
Yes! There's a .csv download on the Import and Export screen.
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Can you organize your books?
Yes, there's a screen that lists all your books. "My Books -> My Reading Log."
You cannot group or catalog your books. Only mark them as to-read, currently-reading, or read.
You cannot search within your books.
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Does it tell you when your friends add a book, or finish one?
No. OpenLibrary isn't a social network whatsoever.
There is no phone app.
There are some unofficial knockoff apps that probably wrap the website in ads.
OpenLibrary General impressions
OpenLibrary is not a GoodReads alternative. It's a whole other thing entirely.
You can literally check out and view digitized copies of books.
OpenLibrary is part of a larger project -
The Internet Archive. They share a common account system, which is confusing. It's also a crappy account system.