Yes, as the scan completed with my collection, I am noticing a lot of pictures not tagged when they could have - meaning that they include faces already tagged. Admittedly, they are all quite blurred.

It did also an amazing work with what was in fact recognized, though.

I am going to keep it and update it thoroughly for all new additions, as I am liking the idea of a collection of face-tagged pictures, but I have to give up with most of the older pictures. Even wanting to devote some time to proper tagging, it's definitely too much time.