Great product! It simply do, what it does. Scan book for ISBN. Fetch data from internet. Structure my ebook library. Better than all others tested products independently of price. This product free, but I already donated for excellent work.
It has potential, but it's too slow, uses (in my opinion) way too much memory, and it doesn't recursively traverse directories, making it more difficult to add large numbers of books. Some people might find it useful, but it just didn't cut it, for me.
There are no 4 star reviews.