Works well for most common cases

Nice tool for finding duplicates. Beware that it refuses to scan the ~/Library folder, so you cannot use it for finding duplicate emails, unless you manage to hard link ~/Library to another folder with a different name (you must use some low-level kernel API to do this). This "unfeature" should be documented, so people wont buy the app if they want to use it this way. Also, it may take a looong time to complete if you have many files (after >8 hours it still didnt finish processing nearly 120000 files).

purposefullymeaningless about Duplicate Detective: Cleaner, v1.5