Hi Barry,
I’ve also tested the trial, but there are some limitations in my opinion.
The last version1.1.1 tagged some photos with food, but there are things I do not eat normally.
So i see little elephants in the zoo, a wooden puppet and other strange things 
You are not able to change the excire keyword hierarchy and, and and.
The idea is good and I think in one year or so, they will be ready for the workflow of a semi prof photographer, but at the moment I’m afraid to spend time for 30k Fotos in an non prof way.
The test I made was wit 1500 pictures, the same I use for every test for photo software thats 5% of my photos.
What is very good is searching for persons based on a photo with this person…that works great
I have tested since the first version and you can get a lokk at Excire Forum - General Questions for first impression.
And some infos here DAM-Take a look at Excire Foto - News and announcements - DxO Forums
stay tuned