It works pretty darn well. I bought the universal kit and it comes in handy when I need to clean up someone else's gun.
I have two complains. Since the whole thing is based on the flexible cable, you can't push it through anything. I have a .22 revolver whose cylinder is too short for the brush to fit into and still be able to pull it through the bore so I have to use a rod for that gun.
Once, while cleaning a rifle, the patch got stuck about 1" into the bore. The easy thing to do would be to push it back out, but I couldn't do that with the cable so I had to pull the patch through with considerable force. I think my hand is still dented from the cable.
Does it work? Yes, but keep a couple of rods around anyway.