I’m not sure I would want to carry them about with me, as they are not the lightest of fire lighters, but I will certainly be keeping a few in my vehicle kit where I often carry fuel and heavier equipment for longer term camps.
The picture shown here was taken about half a minute after first lighting the wick.
The wick starts to melt the wax and then the resinous wood of the cone starts to burn as well.
Here you can see some of the wax dripping out of the cone. In a normal fire lay this also helps to get some of the other kindling going but even in this simple test the cone burned for just over ten minutes on
If that’s not enough to get even the most stubborn of kindling aflame, something is seriously wrong with the way your fire is set up.