is that switch in the picture for testing the breaker, because it appears that if if you turn it on, it will result in a dead short [Linked Image]

as for the product, i don't know if it would be a big improvement for new construction, because even though some time is saved on wiring the devices, you would most likely end up using more wire, and it takes more time to run and secure the additional wire

However, this could be very helpful in retrofit situations, in which there is normally one wire dropped down the wall from the attic or pulled up from the basement to each outlet. often these are joined in overstuffed junction boxes above or below each room. in this situation, since all of the wiring is being run anyways, a time saving device such as this would be a great benefit.