Seems to work, may shift fit in the shoe
Honestly I can’t tell if they make a big difference bc I don’t wear heels all the time for long periods of time. They seem fine, were easy to install, and are relatively non discreet. I disagree with their contention that it shouldn’t change your shoe size or the way your foot fits in the shoe. I do notice a difference in how my foot fits in the shoe (perhaps indicating it is working by shifting my weight EVER SO SLIGHTLY) but as a result it so EVER SO SLIGHTLY shifts how my foot fits in the shoe and it just does feel a tiny bit tighter. It may be just a me problem since I’m in between sizes and I used these in shoes that were on the smaller size, but I think it does change how your foot fits and could change the size.