It seems a little quicker for launching applications vs. launching from the application folder in dock. It's nice that you can copy text out of a document in preview mode.
Path Finder seems better than the Finder but not worth paying for or having to deal with using it as well as the Finder. I think I need to use it more to evaluate.
Bugs/Missing features
It can't undo file moves or renames. Not really sure what it can undo.