I really didn't have much luck with the de-duplication. I tried photostructure for about 3 weeks and since stopped. I was trying to pull photos from multiple different drives/folders into one central organised place. A few issues:

  - The de-duplication didn't seem to work, it at least was defeated by my messy files. I spent many hours manually going through the results and finding many dupes. Then I lost interest in doing that and gave up.

Edit: I've just realised, was this (by design) simply copying each photo into the merged tree but then if I browse using the photostructure app it will hide the dupes? Can I prevent it making a copy? I want to use other file/photo browsers also.

  - can't use datestamp info in the filename?

  - very, very slow to sync from my external USB 3 drive. I'd be happy with that if the de-duplication worked. Also the status about what it's doing seems sporadic and half the time appears to be doing nothing at all. Maybe my laptop is too slow? 
 
  - no map view

I did like the feed of random photos. I saw loads of great old snaps I'd forgotten about. Somewhat bizarrely, when I wanted to share them quickly with others I ended up taking a photo of the photo(s) with my smartphone and sharing that via WhatsApp. That's more my failing but it did seem a bit silly that I resorted to doing that.