
There are special tools for testing USB cables, but I don't have anything difficult. I have two USB-C power meters (Satechi and Kavalan) so I can at least compare the performance to a few other cables I have, including the expensive Thunderbolt 3 cable. Please note that these are USB 2.0 cables. If you're using them to charge devices, it doesn't matter (and might be preferable). If you need them for data transfer and your devices can reach faster speeds, get faster cables. When swapping out input/output cables, PD chargers and devices, there is no noticeable difference in the functionality and performance of this cable compared to other cables. Of course, 100 watts for cell phones is an exaggeration, but I have a laptop that sometimes draws over 60 watts. As far as I can tell, these cables deliver what they promise. Structurally, the braid makes the cable slightly stiffer than cables without the braid. Compared to USB 3.0 cables, the ends are smaller and the cable itself is thinner and more flexible. They're cheaper too, so if you're just buying them to charge, ESPECIALLY if you're taking them out, USB 2.0 cables are preferable. They also appear to be more reliable, perhaps because their flexibility makes them less prone to bending damage. As they are not for sale at the time of writing I cannot rate them. That being said, they seem to be great cables - unless you require USB 3.