I have not seen these, but just wanted to say that having navy booties has been an incredible enrichment to my wardrobe. I got mine two years ago (from ALDO, I believe - they are still in the basement until they will come back up in a few weeks) and they go with SO MUCH: skirts, dresses, pants, everything (since I wear a lot of blue, obviously).
Btw, I just ordered 'your' grey Zinda boots today, I hope they'll work as well for me!