In my case, for plantar fasciitis, it didn't work. On the contrary, the first 3 days I suffered worse. After 10 days I replaced them because they made me feel worse. However, as a material they seem to be of good quality. They might work for others.

As a shoe insole, it fits well on the foot. It also has a point where you place it to stick in place so that you don't put it at the front of the shoe and by the time you take 10 steps, it has moved out of position and is annoying instead of helpful. The downside is that after a little sweat, the adhesive came off, so it needs to be stuck with double-sided tape to stay in place. However, it's good for the price.

ordered size Large but didn't expect child size item which barely covers half my foot.
might be beneficial but not for men with large feet.

I have bought these insoles twice. One for the sandals I wear inside the house (as slippers) and later for some sports shoes that didn't have enough support. They were very effective, especially in the sandals. As soon as I put them on, my foot feels relieved.
The adhesive they have worked fine for the sports shoes, but not for the surface of the sandals. A little super glue solved the problem.
The only negative, for which I would remove half a star, is that they heat up the foot quite a bit in the sports shoes.
Edit: I removed another half star because it seems that it didn't stick even in the sports shoes.

Good insoles. I bought them for my elderly father who was suffering from plantar fasciitis. I don't know if it was a coincidence, but after wearing them regularly for a few days (even inside slippers), he saw a great improvement in his discomfort. The problem is that because they don't cover the entire sole of the shoe, meaning they don't cover the area under the toes, they slide forward and therefore come out of place. They do have a point on the heel with adhesive that sticks to the shoe to stabilize the insole quickly, but it lost its ability to stick.