I installed and tried the program and I am going to keep it.
I wanted to dedupe the folder where I download photos and videos from my camera. I opted for the slow exact match type.
I was distrustful at first as any photo/video gone would be irreplaceable. So I individually opened and compared about 100 of the about 5.000 duplicates found from the results page.
The results were accurate and all pairs or triples were exact copies although the file name could be different (depending on file naming according to the program I used to import them).
It was a bit disappointing that there was not any option to see large thumbnails in the results, but this is not so bad. The details had date created and date modified. Here it would be better to have a date shooted for example for photos, this was missing.
The program did however not detect duplicates that had been rotated eg. 90 degrees. But that is ok, better to err on the safe side. With some videos I realised that some files were with different extentions but were in the results page, it was mot the main video file eg.avi or mpeg4 but .ifo and .bup files, these I carefully unchecked after pressing keep one (the oldest) from the results screen.
So all in al,l it is a program that you can trust if you use exact match and if you take the time to check the results. Deleted files will be zipped for every delete operation as a backup to be restored in case of mistake to a folder in the C:\Users\user_name\AppData\Roaming\Wise Duplicate Finder folder, but only to be restored by the program itself when needed.