rReplikator is an application and does not run as a service. A user has to log on in order to start rReplikator.

some application files like Outlook PST-files are locked in  a way that prevent copying these files. rReplikator will show these files as locked but will not be able to replicate them even if the option "try to copy locked files" is set.

files are locked for writing during the replication process. Applications might complain about files not being readable

rReplikator can not be used to obtain an image of a given hard drive.