I have been using these socks for years. They are super comfortable, and they don't slip down into your shoe. I play tennis in them several times per week. They are like new after a few years of wear. I did buy about 12 pairs so I would never run out of them. My feet never hurt after playing or exercising, and I attribute it all to these wonderful socks.
I would highly recommend them to anyone with any type of foot issue.
Bottom Line: Yes, I would recommend this to a friend