First I've seen of this particular rack. Personally I prefer something with more rounded edges with hopefully less chance of imparting injury to the rider in a mild crash. Any rack will hurt if you make hard contact with it, its just that the edgy stuff can cause greater trauma.
That said the Rusk rack likely has a more usable load platform than it's closest competitor, the CycleRack. Plus my mentioned risk of injury is negated if one plans to attach something like a large Pelican hard shell box.