I am very pleasantly surprised. I have to stand a lot at work and have this in my work shoes soles. They fit very well into it. At first it is a little bit unusual because the metatarsal gets a rest. After 2 days I got used to it.
The foot problems are much less than before. How to keep long the soles finally, I can not say at this time because I now use only since a little more than a week.
I can only recommend for me. Whether the long term, can cause discomfort to them, I can now, of course, not yet answer.
I would definitely buy again, therefore the 5/5 star.