Thanks DirtyAnkleBeekeeper....You can definitely catch a swarm with a regular hive body, but this box does have a few advantages. First, with the queen excluder material over the entrance, the stragglers can enter the box once you have captured the queen and majority of the swarm. Second, once the bees have settled down and few are entering, you can close off the entrance completely and open the back side vent/screen.
...Tim