That is exactly what I said to myself when I saw the ad. If that stuff remains workable after several days, then it is not truly clay based. Believe me, I know what clay is like. Most soils here in Arkansas-and a lot of the southeast-are full of it. It is slimy when moist, and will dry rock-hard (a lot of our soil is full of dirt-clods). And if it does manage to dry without hardening, then it no longer holds a burrow (I tried it on my ackies). As mentioned by sungazer, it breathes extremely poorly. I'd say that it has pretty much all of the qualities you should NOT look for in your soil.
Something I have pondered over was if the soils in Africa really are clay based. Most uro keepers claim that they are, and yet Robyn comes along with his clay-absent decomposed rock based soil and the uros (and monitors, and gilas) go crazy on it. It also contradicts with what most keepers of African monitors (like albigularis) reccommend, which is an inorganic soil with low levels of clay. So what is you guy's allure to the clay? It holds burrows well? Most soils will hold burrows well, but that is more dependent on moisture levels than the soil type.
Oh, and whoever made the comments on the dustiness, yeah, most soils do become dusty after they dry out. That is why you must add more water. Finding the proper moisture levels-which should actually vary in the cage-is just a whole other part of the soil puzzle.
Sorry, I don't really know where all that came from. I guess it was out of boredom...
Cheers,
Ryan
-----
There are three kinds of people in this world: people who can count and people who can't.