I've tested two sand textures (finer and coarser grain) on an
AoS model:
I'm pretty happy with the stuff. It went on pretty well, without making much of a mess, which is important to me because of how much my hands shake. I applied both textures at the same time but found them to dry at different speeds. Good to know for layering while they're still wet. I only have this one model, so I never tried layering them one after another with ample drying time.
The dunes aren't as smooth or as tall as I'd like, the latter of which goes back to what I said above. I've bought silicone brushes in the meantime to try and get smoother results, and think that wetting the tool more might help as well, but ironically I ran out of motivation to work on fantasy models at the same time and never gave it a try.
On the color, I ended up putting a wash and light drybrush on the texture because it looked too flat for my taste.