It gives you the ability to use crit crafted gear in 5 slots, provided you reach the valor pre-req. Same as the WH set.
However, the set bonus on BM doesn't transfer. So... in an endgame sense, it really gives you the BM appearance with aug slots however slotting in WH armoring, in an ideal world.
Some people, for example, like the Trooper Supercommando appearance.