I like aapanel very much as it is very user friendly and bundled with lot of features for a intermediate level hosting management.
As this panel doesn't include complete range of features which can be found in webmin/ispconfig like control panel,
many users like me would try to setup and configure the functionalities/features which are not present at the current moment.
Inorder to do such tasks, a complete documentation would be very mandatory so that no one would mess up wrongly.
Eventhough this aapanel is very user friendly, that doesn't mean
that it doesn't need a basic User Level Documenetation which explains on how to use aapanel.
As far as I searched,
the maximum documenation I found is this refrence page
and few forum discussion threads like installation page
Seriously, for a control panel,
a proper documentation is mandatory.