Problem is JIM, I have. The one thing that I dislike about the Coughlan's tinder is the way you have to crush it into a coin shape and tear the "coin" in half. Easy enough with two hands, but I shudder at the idea of doing it with broken bones in my hands or even lacerations.
Burn time is great, but I wish it had the no hassle/no prep simplicity of the Spark-Lite tinder.