The NTFS filesystem supports a lot of features like Hardlinks, Junctions Symbolic Links and Mount Points, which are sparsley supported by standard tools. This tool is kind of a NTFS Swiss Army Knife and can do lots of things, like create SmartCopies, which preserve the inner and outer Hardlink/Junction/SymbolicLink structure, does hardlink based incremental Backups and a lot of other things which can not be found anywhere.
FAQ Manual