I'm happier with a "spider" one piece of leader I use over and over (the fabric is the body, the threads are the spider legs).
My machine starts with a default of small stitches -- which is good sometimes but I don't always want so I prefer to start on the spider. If I used the leader system, my quirks and twitches set in and I'd want a leader for the leader....
It's a great concept though. We all work in different ways.