It works in a simple way. You only need to set the time you want it to tell you to go to bed. Then, the program will show a message or, in case you have set it, it will shut down automatically after that reminder.
The most curious one is the Addict mode that will block the task manager and won't let you abort the shutdown.
Bedtime Help is good for those users who need someone to tell them to stop using the computer and go to bed or for parents who want to control their children.