Calibre integration

I'm thinking of buying a pocketbook reader; probably the new one, with color. But one of the reasons I've stuck with Kobo so long is how well integrated into Calibre it can be with various extensions. Especially adding books to it with collections automatically made.

I have a lot of books, and while they don't always need to always be on the reader, I'd like some of them to be there. So, how are collections or whatever managed by Pocketbook? Thanks in advance!