I don't have much real life experience like others in the forum but what worries me is getting short of Tinder-Quick or cotton balls. I don't think you can ignite successfully any kind of material with it unless it's dry and very fluffy. That's why the magnesium bar looks interesting because you have a lot of tinder but it has other drawbacks as well. There's a consensus here that the best is to have more than one way of making fire.

Frankie