Ragnar,

I think it's a smart idea. It does speed up installation. If you're a contractor, you want to get the job done and move to the next instead of wasting time.

You don't want to be sitting on the floor with wire cutters and cutting and trimming tiny bits of wire.

I actually think it would be better if those interconnecting wires were molded inside the device instead of sticking out the back like that.

These are the guts of the device in question:

[Linked Image from niko.be]