In my first project I used the creation and modification date wizards as they automatically insert the apropriate date. Unfortunately they are a little bit limited.
1. They only allow to enter the date without the time. But the Joomla equivalents include date + time. I could not find a 'date time' format.
2. These wizards would make more sense if they would also include the Joomla standard fields 'created_by' 'created_alias_by' and 'modified_by' , so that the user_id of the user who created / modified a record would be automatically inserted.