The ability to keep track of my kids every day, I love that they can see their progress at school as well as what homework needs to be done for the next week! Sometimes it takes me awhile to get into it but once i do its great! I wish there was an option where we could add pictures instead of just names so we didn't have to write down everything each time.
Also when adding new students sometimes it doesn't work right away which makes entering data difficult. We use this app daily and helps us stay organized with our busy schedules.