Can you easily get books in?
Yes!
Zeneca has a servicable goodreads import function. It imported 635 of my 639 Goodreads items. The success email included clear details about the books which failed to import.
☆
Can you easily get books out?
Sadly, no. As of this writing, there is no export function. Zenica's is a "very rough beta", so this will likely change.
⭐
Can you organize your books?
Kind of. You can create bookshelves, and put books on them.
You also get two default bookshelves (To-Read and Read), which you can rename
Unfortunately, you can't search within your books. There's what looks like a search box above to-read and read. But it doesn't search them.
The two-column cover view looks nice on a big screen. But the lack of search and filtering are unfortunate.
⭐
Does it tell you when your friends add a book, or finish one?
Unknown. Zeneca does have the concept of subscribing to others' timelines.
Not exactly. There are nice instructions to add the site to a phone's home screen.
Zeneca General impressions
Zeneca is another promising new book-tracking app.