I was a bit wary as SuperTopo called the crack 5.10b and sandy, and our earlier days of climbing in Arches taught me to treat the Entrada and Dewey Bridge sandstone with much more respect than the nice Windgate sandstone of Indian Creek. However, several other guidebooks called the crack 5.9+, and I'd agree that it is more like 5.9+, and not too sandy as compared to some of the other climbs we had done in the park. Still, compared to Owl Rock (which is NOT representative of Arches climbing) and Indian Creek, this crack is less secure in jams, smearing, and pro, so you should have your desert climbing lead head on for this one.
Note: I didn't think too seriously about cracks being described as sandy until I experienced some in Arches. Your feet slip much more on the facey bits when there is loose sand around, and you can seriously feel your hand and foot jams are not as secure. You have to set them harder or pull harder to the side to get the secure. I can also visualize much more here either cams blowing out the rock or shearing straight out of a crack like they can out of one lined with ice or calcite. Of course I'm still developing my feel for this type of sandstone . . .