I just signed up for this and imported my GoodReads csv export. the csv has 90ish rows and I was only able to import 60ish rows.

I get that Open Library doesn't have as much data as GoodReads, but I wish it would show me the data it couldn't import so I could add it manually to Open Library's data store.

Nevertheless, I love the idea and I'll be opening bug reports and maybe code contributions if something looks easy enough.