The component element is the message store. Then you configure instances of the module to display the message. I made use of the conditional cookie feature to display the message to the visitor until they closed it. Then Sticky Message remembers that they've already seen the message.
I did have one issue. I needed to increase the expiry time for a conditional cookie. The support was very quick - same day - and very helpful.
A worthwhile component for the price that does what it says.
We upgraded to the professional version because you can include databases and folders/files outside of Joomla as part of the backup. Plus you have more options for excluding items from the backup.
Akeeba just works. Its the best way to backup/restore or move/copy your Joomla site.