In my experience the key factor in how well strike-anywhere matches work is how dry they, and the striking surface, are. Fresh and dry from the sealed box they work very easily and well. Leave a couple out on the counter while you take a shower and they are much less reliable. A few days exposed to southern humidity and they lose a lot of their edge. A few months, and I've had a hard time getting a light out of a full box of them.

Wax or shellac helps, a few people used to stuff little desiccant capsules into their match safe. I've seen a commercial match safe that was brass and had a bit of desiccant in the lid that could be dried in the oven.

If these matches have found a way around this, or are less sensitive to moisture, I may have to start including more matches in may gear.