The ability to create multiple user accounts for different people (parents, teachers etc.) within a school or center is very useful as it allows each person that needs access to their own data without having to go through a teacher.
The only thing I dislike about Kinderlime is that there are no options for creating groups of users who can share data with each other but cannot see each others' individual information. It's great to be able to have different types of data available from one location. Being able to keep track of attendance, report cards, and other important documents is easy and convenient.