Have been using these pegs now for over a month. I live on top of a hill in a very windy location, but can't use normal plastic or wooden pegs as owing to the very strong gusts, half my washing will end up muddied on the ground, or even blown over the fence! These are awesomely strong and won't let any items be blown off the line. And they are virtually rust proof so they will last a lifetime.
The only disadvantage is that older people or those with weak hands might need lighter thinner gauge pegs than these. Also, because they are expensive, theft could be a thing, so when I have finished with them, I bring them in, instead of leaving them permanently on the line.