Limited functionality, configurability, provides no advantages over competing applications.

Uninstalled after first use:
- Two advertising pop ups when first opened and 1 more asking me to write this review when I quit.
- Auto-selection is arbitrary and resulted in me needing to manually selecting each item.
- “Filter” does not allow for filtering of anything of value like a folder name or date, just the extension. Which is redundant because those can be specified in the preferences.
- There is a chime when the scan is completed and there is no way to turn it off. I don’t need noises (or pop ups).
- There are several other finders that provide more capability and with less hassle.

saneman about The Duplicate Finder