We started on 19/3/17 with 3 books and the first two weeks were a bit disappointing, in that nothing moved. Then, I swapped one book out, and another from home in. It was as if this one change had given people permission to use the library - we had a few donations and loans began in earnest.
Six weeks after we opened, we now have books moving in and out every day, and I find myself fascinated with watching the library, and talking about books with the people I work with.
I am loving the Tiny Free Library, and the only downside - I now have all these titles that friends have recommended and not much time to read them.