The force that can be built with this string convinced me. I have used it to build a spin, it's something they previously met properly. The long-term test is still pending. The build quality is really OK, that does not look like cheap cobbled together from. The only thing I would have liked different is the migration route. The maximum elongation is too small here, my could spin as tolerated a bit more. In the product description is 115% maximum elongation. I now habs not measure accurately, but they stretch to a little more than twice its length, then it's over. So the description fits the day!