The ease of use, being able to see at glance who has read what book, where books are located in storage. I don't like that there's no way to have multiple users access one account (even if you could it would be cumbersome). It seems as though this program was developed primarily by marketing people rather than programmers or software developers. We're looking into other options but so far nothing else meets our needs quite as well. There isn't anything we dislike about kindertales except maybe how difficult it is to find someone willing to help us set up an account/login information. Some things just aren't intuitive when first setting them up.