The quality from these is exceptional, as it has been with every pair of Kix'ies I've tried. The price is a high up-front investment, but dollar for dollar, these will be a better product and you will get more wears. The fit is buttery smooth and elastic, and the fit at the toes is comfortable, with the seeming flattening to avoid uncomfortable bunching. The sole will be a bit slippery, and I highly recommend using no-slip pads in the shoes you pair these with. These seem somewhat more durable than other Kix'ies, maybe as a result of a denser weave.
The elastic grip-top is extremely durable and comfortable, and in at least one pair from Kix'ies, has outlived the sock material itself. Depending on how you pull it up to the inner thigh, you may have some pinching, but redressing the sock solves this easily. These stay up in almost all circumstances, but a very brisk walk will weaken their grip.
A genuinely great investment if you're looking to upgrade an existing set up with thigh highs of this kind.