What is the advantage of using something other than PJ cotton balls? Is it burn time for dealing with wet tinder? I never have a problem getting one lit from a spark, and they burn well for around 5 minutes.

I actually make mine much like Tinder Quik, I apply some PJ, work it into the cotton ball, and then roll into a tight cylinder wrapped in a single ply of tissue paper, trimming the ends to make a cylinder. This cuts down on the mess when I go to pull one from a small ziplock bag. If I'm using a spark to ignite I just pull the cylinder apart to expose loose fibers and its good to go.

I might have to pick up some of those Weber cubes to see what the fuss is about.